> There are some high end car models (Lexus, Infiniti, Lincoln,
> Ferrari, Maserati, etc.) that have high compression engines,
> turbocharged, supercharged, etc. that absolutely have to have 91/92
> Octane fuel or else you can do severe engine damage, and that's what
> they say in the manual. Disregard that warning at your own rather
> substantial risk.
>
Exactly. I have a '98 Continental with the all aluminum limited production
twin-cam 300+HP V8 (actual HP is higher but FWD takes some of it away) and
it clearly states "91 octane or better" fuel on the dash. It simply runs
like S%!T on anything less and if I take it out to the western states that
do not offer higher octane fuel I have to take a box of octane booster
with
me in the trunk. With lower octane fuel the gas milage drops from 24-25mpg
highway all the way down to 16-18mpg. It is simply not made for that fuel
with it's higher compression.
> And the same thing goes for older muscle cars that do not have
> computer controlled fuel and ignition - if it has a double-digit
> compression ratio and a carburetor and points ignition, you might not
> be able to de-tune the engine enough to run safely on regular fuel.
>
> --<< Bruce >>--
>
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