octane SUBARU FORESTER 2001 SF / 1.G Owners Manual

7-2
Fuel
CAUTION
Use of a fuel which is low in quality or use of an inappropriate fuel additive may cause engine damage.
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.