octane SUBARU IMPREZA 2000 2.G Owners Manual

7-4
Fuel requirements
Fuel octane rating
Your eng ine is d esig ned to use only unlead ed g asoli ne with an oc tane
rating of 87 AKI or hig her. This oc tane rating is t he averag e of the Re-
searc h Oc tane and Motor Oc tane numb ers and is c ommo nly referred
to as the Anti Knoc k Ind ex (AKI).
Using a g asoline with a lower oc tane rating c an c au se p ersistent and
heavy knoc king , whic h c an d amag e the eng ine. Do not b e c onc erned
if your vehic le sometimes knoc ks lig htly when you d rive up a hill or
when you ac c elerate. See your d ealer or a q ualified servic e tec hni-
c ian if you use a g asoline with the sp ec ified oc tan e rating and your
vehic le knoc ks heavily or p ersistently. Unleaded gasoline
The nec k of the fuel filler p ip e is d esig ned to ac c ep t only an unlead ed
g asoline filler nozzle. Und er no c irc umstanc es shou ld lead ed g aso-
line b e used b ec ause it will d amag e the emission c o ntrol system and
may imp air d riveab ility and fuel ec onomy. Gasoline for California-certified LEV
If your vehic le is a California-c ertified Low Emiss ion Vehic le (LEV) as
ind ic ated on the und erhood tune-up lab el, it is d es ig ned to op timize
eng ine and emission c ontrol system p erformanc e with g asoline that
meets California low sulfer sp ec ific ations. Your ve hic le will op erate on
g asoline meeting Fed eral sp ec ific ations. Gasoline for cleaner air CAUTION
Do not let fuel spill on the exterior surfaces of the vehicle. Fuels containing alcohol may cause paint damage, which is not cov-
ered under the SUBARU Limited Warranty.
Your use of g asoline with d eterg ent ad d itives will help p revent d ep os-
its from forming in your eng ine and fuel system. Th is help s keep your
eng ine in tune and your emission c ontrol system wor king p rop erly,