coolant TOYOTA COROLLA 2020 Warranties & Maintenance Guides (in English)
Page 40 of 66
39Maintenance Log
MAINTENANCE LOG
MAINTENANCE
15,000 miles or 18 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico  
or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1 
NOTE: If 0W-20 (2ZR-FAE engine only) or 0W-16 (M20A-FKS engine only) oil WAS NOT 
used at the last oil change, replace engine oil and oil filter.2
Inspect the following:  _Ball joints and dust covers   _
  Exhaust pipes and mountings
 _ Brake lines and hoses  _
 Radiator and condenser
 _ Cabin air filter  _
 Steering gear
 _ Drive shaft boots   _
  Steering linkage and boots
 _ Engine coolant
4 
NOTE:  Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may  
shorten the life of the cabin air filter. Replacement may be needed if you notice   
reduced air flow from the air conditioner and heater or if the windows fog easily when  
you use the “Fresh” mode. Consult your dealer if any of these conditions occur.
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect engine air filter
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:5
Replace engine oil and oil filter2
 Tighten nuts and bolts on chassis and body
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or 
door-to-door delivery use:
Replace engine oil and oil filter2
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed   
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3   Perform these service items only if you drive primarily under the conditions indicated. 4  Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.5 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Inspect wiper blades 
Rotate tires
Visually inspect brake linings/drums and 
brake pads/discs 
Page 42 of 66
41Maintenance Log
MAINTENANCE LOG
MAINTENANCE
30,000 miles or 36 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico or Saipan only) 
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Replace cabin air filter
Replace engine air filter
Replace engine oil and oil filter2
Rotate tires
Inspect the following:  _Ball joints and dust covers 
 _ Brake lines and hoses
 _  Brake linings/drums and  
brake pads/discs
4
 _Drive shaft boots
 _ Engine coolant
5
 _Exhaust pipes and mountings
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:
6
Replace manual transmission oil
Tighten nuts and bolts on chassis and body
 
 
 
 
 
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed 
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3 Perform these service items only if you drive primarily under the conditions indicated. 4 Inspect thickness measurement and disc runout.5   Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.6 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
 _
  Fuel lines and connections, fuel tank band 
and fuel tank vapor vent system hoses
 _ Fuel tank cap gasket
 _ Radiator and condenser
 _ Steering gear
 _ Steering linkage and boots
 _ Transmission for signs of leakage 
Page 44 of 66
Inspect wiper blades
Rotate tires
 Visually inspect brake linings/drums  
and brake pads/discs
43Maintenance Log
MAINTENANCE LOG
MAINTENANCE
45,000 miles or 54 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico  
or Saipan only) 
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
 NOTE: If 0W-20 (2ZR-FAE engine only) or 0W-16 (M20A-FKS engine only) oil WAS NOT 
used at the last oil change, replace engine oil and oil filter.2 
Inspect the following:  _Ball joints and dust covers   _
  Exhaust pipes and mountings
 _ Brake lines and hoses  _
 Radiator and condenser
 _ Cabin air filter  _
 Steering gear
 _ Drive shaft boots   _
  Steering linkage and boots
 _ Engine coolant
4 
NOTE:  Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may  
shorten the life of the cabin air filter. Replacement may be needed if you notice   
reduced air flow from the air conditioner and heater or if the windows fog easily when  
you use the “Fresh” mode. Consult your dealer if any of these conditions occur.
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect engine air filter
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:5
Replace engine oil and oil filter2
 Tighten nuts and bolts on chassis and body
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or 
door-to-door delivery use:
Replace engine oil and oil filter2
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed   
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3   Perform these service items only if you drive primarily under the conditions indicated. 4  Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.5 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details. 
Page 46 of 66
45Maintenance Log
MAINTENANCE LOG
MAINTENANCE
60,000 miles or 72 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico  
or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect the following: _Ball joints and dust covers 
 _ Brake lines and hoses
 _  Brake linings/drums and  
brake pads/discs
4
 _Drive belts5
 _Drive shaft boots
 _ Engine coolant
6
 _Exhaust pipes and mountings
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:
7
Replace transmission fluid or oil
Tighten nuts and bolts on chassis and body
Extensive idling and/or low speed driving for a long distance such as police, taxi or 
door-to-door delivery use:
Replace continuously variable transmission (CV T ) fluid
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed 
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3 Perform these service items only if you drive primarily under the conditions indicated. 4 Inspect thickness measurement and disc runout.5   Initial inspection at 60,000 miles/ 72 months. Inspect every 15,000 miles/18 months thereafter. 6 Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.7 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Inspect wiper blades
Replace cabin air filter
Replace engine air filter
Replace engine oil and oil filter2
Rotate tires
 _  Fuel lines and connections, fuel tank band 
and fuel tank vapor vent system hoses
 _ Fuel tank cap gasket
 _ Radiator and condenser
 _ Steering gear
 _ Steering  linkage and boots
 _ Transmission for signs of leakage 
Page 48 of 66
47Maintenance Log
MAINTENANCE LOG
MAINTENANCE
75,000 miles or 90 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico  
or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1 
 
 
NOTE:  If 0W-20 (2ZR-FAE engine only) or 0W-16 (M20A-FKS engine only) oil WAS NOT 
used at the last oil change, replace engine oil and oil filter.2
Inspect the following:  _Ball joints and dust covers   _
 Engine coolant4
 _
Brake lines and hoses  _
  Exhaust pipes and mountings
 _ Cabin air filter  _
 Radiator and condenser
 _ Drive belts   _
 Steering gear
 _ Drive shaft boots   _
  Steering linkage and boots
NOTE:  Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may  
shorten the life of the cabin air filter. Replacement may be needed if you notice   
reduced air flow from the air conditioner and heater or if the windows fog easily when  
you use the “Fresh” mode. Consult your dealer if any of these conditions occur.
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect engine air filter
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:5
Replace engine oil and oil filter2
 Tighten nuts and bolts on chassis and body
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or 
door-to-door delivery use:
Replace engine oil and oil filter2
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed   
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3   Perform these service items only if you drive primarily under the conditions indicated. 4  Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.5 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Inspect wiper blades
Rotate tires
Visually inspect brake linings/drums  
and brake pads/discs
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE: 
Page 50 of 66
49Maintenance Log
MAINTENANCE LOG
MAINTENANCE
90,000 miles or 108 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Replace cabin air filter
Replace engine air filter
Replace engine oil and oil filter2
Rotate tires
Inspect the following:  _Ball joints and dust covers 
 _ Brake lines and hoses
 _  Brake linings/drums and  
brake pads/discs
4
 _Drive belts
 _ Drive shaft boots
 _ Engine coolant
5
 _Exhaust pipes and mountings
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:
6
Replace manual transmission oil
Tighten nuts and bolts on chassis and body
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed   
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2    Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3 Perform these service items only if you drive primarily under the conditions indicated. 4   Inspect thickness measurement and disc runout.5  Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.6 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
 _
 Fuel lines and connections, fuel tank band 
and fuel tank vapor vent system hoses
 _ Fuel tank cap gasket
 _ Radiator and condenser
 _ Steering gear
 _ Steering  linkage and boots
 _ Transmission for signs of leakage 
Page 51 of 66
50Maintenance Log
MAINTENANCE LOG
MAINTENANCE
95,000 miles or 114 months
 Add Toyota EFI Tank Additive or 
equivalent (M20A-FKS engine AND 
Hawaii, Puerto Rico or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Rotate tires
 Visually inspect brake linings/drums  
and brake pads/discs 
NOTE: If 0W-20 (2ZR-FAE engine only) 
or 0W-16 (M20A-FKS engine only) oil 
WAS NOT used at the last oil change, 
replace engine oil and oil filter.
2
Additional Maintenance Items for 
Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect ball joints and dust covers
Inspect drive shaft boots
Inspect engine air filter
Inspect steering linkage and boots
Replace engine oil and oil filter2
 Tighten nuts and bolts on chassis  
and body
Driving while towing, using a car-top 
carrier, or heavy vehicle loading:
6
Replace engine oil and oil filter2
 Tighten nuts and bolts on chassis  
and body
 Repeated trips of less than five miles in 
temperatures below 32°F / 0°C:
Replace engine oil and oil filter2
Extensive idling and/or low speed driving 
for a long distance such as police, taxi  
or door-to-door delivery use:
Replace engine oil and oil filter2
100,000 miles or 120 months
 Add Toyota EFI Tank Additive or 
equivalent (M20A-FKS engine AND 
Hawaii, Puerto Rico or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Replace engine coolant4
Replace engine oil and oil filter2
Rotate tires
 Visually inspect brake linings/drums  
and brake pads/discs
Additional Maintenance Items for 
Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect ball joints and dust covers
Inspect drive shaft boots
Inspect engine air filter
Inspect steering linkage and boots
 Tighten nuts and bolts on chassis  
and body
Driving while towing, using a car-top 
carrier, or heavy vehicle loading:
6
 Tighten nuts and bolts on chassis  
and body
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
D
EALER SERVICE VERIFICATION:
D
ATE:
MILEAGE: 
Page 52 of 66
51Maintenance Log
MAINTENANCE LOG
MAINTENANCE
105,000 miles or 126 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico  
or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1 
NOTE: If 0W-20 (2ZR-FAE engine only) or 0W-16 (M20A-FKS engine only) oil WAS NOT 
used at the last oil change, replace engine oil and oil filter.2
Inspect the following:  _Ball joints and dust covers   _ Engine coolant5
 _
Brake lines and hoses  _  Exhaust pipes and mountings
 _ Cabin air filter  _ Radiator and condenser
 _ Drive belts   _ Steering gear
 _ Drive shaft boots
 _  Steering linkage and boots
NOTE:  Driving in heavy traffic, on dirt roads or in urban, dusty or desert areas may  
shorten the life of the cabin air filter. Replacement may be needed if you notice   
reduced air flow from the air conditioner and heater or if the windows fog easily when  
you use the “Fresh” mode. Consult your dealer if any of these conditions occur.
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Inspect engine air filter
Replace engine oil and oil filter2
Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:6
Replace engine oil and oil filter2
 Tighten nuts and bolts on chassis and body
Repeated trips of less than five miles in temperatures below 32°F / 0°C:
Replace engine oil and oil filter2
Extensive idling and/or low speed driving for a long distance such as police, taxi or 
door-to-door delivery use:
Replace engine oil and oil filter2
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed   
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant   
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3 Perform these service items only if you drive primarily under the conditions indicated. 4   Initial replacement at 100,000 miles/120 months. Replace every 50,000 miles/60 months thereafter. Refer to “Engine   
Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.
5   Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.6 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Inspect wiper blades
Rotate tires
 Visually inspect brake linings/drums  
and brake pads/discs 
Page 54 of 66
53Maintenance Log
MAINTENANCE LOG
MAINTENANCE
120,000 miles or 144 months
 Add Toyota EFI Tank Additive or equivalent  
(M20A-FKS engine AND Hawaii, Puerto Rico  
or Saipan only)
Check installation of driver’s floor mat
Inspect and adjust all fluid levels1
Inspect wiper blades
Replace cabin air filter
Inspect the following:  _Ball joints and dust covers 
 _ Brake lines and hoses
 _  Brake linings/drums and  
brake pads/discs
5
 _Drive belts
 _ Drive shaft boots
 _ Engine coolant
6
 _Exhaust pipes and mountings
 _  Fuel lines and connections, fuel tank  
band and fuel tank vapor vent system hoses
Additional Maintenance Items for Special Operating Conditions3
Driving on dirt roads or dusty roads:Tighten nuts and bolts on chassis and body
Driving while towing, using a car-top carrier, or heavy vehicle loading:
8
Replace transmission fluid or oil
Tighten nuts and bolts on chassis and body
Extensive idling and/or low speed driving for a long distance such as police, taxi or 
door-to-door delivery use:
Replace continuously variable transmission (CV T ) fluid
DEALER SERVICE VERIFICATION:
D
ATE:
MILEAGE:
1   Inspect sealed transmissions, transfer cases and differentials for signs of leakage. If any leakage from a sealed 
component is suspected, it is recommended that you have the sealed component inspected by a Toyota dealer. Inspect   
power steering fluid (if equipped) and brake fluid level/condition. Inspect engine and inverter (if equipped) coolant 
level/condition/freezing point. Your dealer may recommend services (Dealer-Recommended Maintenance) based on 
inspection results.
2   Reset the oil replacement reminder light (“MAINT REQD”) or the message “OIL MAINTENANCE REQUIRED” on the   
multi-information display after maintenance at every 5,000 miles.
3    Perform these service items only if you drive primarily under the conditions indicated. 4   Maintenance services of spark plugs are required under the terms of the Emissions Control Warranty. 5 Inspect thickness measurement and disc runout.6  Refer to “Engine Coolant” in the “Explanation of Maintenance Items” section in the back of this guide for more information.7  Replace the vacuum pump vane and the vacuum pump vane caps with new ones, and never reuse the vacuum pump 
vane and the vacuum pump vane caps.
8 Not all vehicles are designed for towing. Refer to your Vehicle Owner’s Manual for details.
Replace engine air filter
Replace engine oil and oil filter2 
Replace spark plugs4
 Replace vacuum pump for brake  
booster (2ZR-FAE engine only)
Rotate tires
 _ Fuel tank cap gasket
 _ Radiator and condenser
 _ Steering gear
 _ Steering  linkage and boots
 _ Transmission for signs of leakage
 _  Vacuum pump for brake booster  
(M20A-FKS engine only)
7 
Page 56 of 66
55Maintenance Log
MAINTENANCE
EXPLANATION OF MAINTENANCE ITEMS
Drive Shaft Boots
Check the drive shaft boots and clamps for 
cracks, deterioration and damage. Replace 
any deteriorated or damaged parts and, if 
necessary, repack the grease. A quali ed 
technician should perform these operations.
Driver’s Floor Mat
•   Only use the driver’s floor mat   
designed specifically for the model   
and model year of your vehicle.
•  Always properly secure the driver’s   
floor mat using the retaining hooks.
•  Never install another floor mat on top   
of the existing driver’s floor mat.
•  Never install the driver’s floor mat   
upside down.
Engine Air Filter
Inspect or replace at speci ed intervals.   
When performing inspections, check for 
damage, excessive wear and oiliness, and 
replace if necessary.
 
 
Engine Coolant
Drain the cooling system and re ll with an 
ethylene-glycol type coolant. Inspect hoses 
and connections for corrosion and leaks. 
Tighten connections and replace parts   
when necessary. A quali ed technician   
should perform these operations. (For   
further details, refer to “Radiator, Condenser 
and Hoses” in the “Maintenance and Care” 
section of the 
Owner’s Manual).
Your Toyota is equipped with Genuine 
Toyota Super Long-Life Coolant. The 
replacement intervals for engine coolant 
recommended in this booklet are based 
on replacement with Genuine Toyota 
Super Long-Life Coolant or similar 
high-quality non-silicate, non-amine, 
non-borate ethylene-glycol coolant with 
long-life hybrid organic acid technology 
(i.e., a combination of low phosphates 
and organic acids). If another type of   
ethylene-glycol coolant is used, 
replacement intervals may be different.