oil additives Citroen DS5 HYBRID4 RHD 2013.5 1.G Owner's Manual

257Checks
A = MA X
B = MIN
If you find that the level is above the A mark or below the B mark, do not star t the engine . - If the level is above the MAX mark (risk of damage to the engine), contact a CITROËN dealer or a qualified workshop. - If the level is below the MIN mark, you must top up the engine oil.
Oil grade
Before topping-up the oil or changing the oil, check that the oil is the correct grade for your engine and conforms to the manufacturer's recommendations.
Topping up the engine oil level
Refer to the "Diesel engine" section for the location of the oil filler cap in the engine compartment of your vehicle.  Unscrew the oil filler cap to reveal the filler aperture.  Add oil in small quantities, avoiding any spills on engine components (risk of fire).  Wait a few minutes before checking the level again using the dipstick.  Add more oil if necessary.  After checking the level, carefully refit the oil filler cap and the dipstick in its tube.
After topping up the oil, the check when switching on the ignition with the oil level indicator in the instrument panel is not valid during the 30 minutes after topping up.
Engine oil change
Refer to the maintenance and warranty guide for details of the interval for this operation. In order to maintain the reliability of the engine and emission control system, the use of additives in the engine oil is prohibited.