Heyblue
Well-known member
1984 crossfire fuel injection (sort of) I assume the proper gas for this year is 87 Octane. Don't have the owners manual and the service manual does not seem to address this issue. Comments please
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Just me its a Corvette it gets the best!! Just part of owning a sports car.
MOTOR Magazine Article | MOTOR Information SystemsObviously, PCM cold enrichment strategy is required even in the case of a brand-new engine because sufficient vaporization of atomized fuel on the backs of cold inlet valves is impossible to achieve. But the inevitability of carbon buildup accumulating on the valves will eventually result in cold (and sometimes even warm) engine performance issues such as stumble, sag, stalling, etc. Injectors spray their fuel volume very close to the beginning of an intake stroke; it’s only later in the stroke that the inlet valve actually opens in order to draw air and fuel into the cylinder. Small portions of the atomized hydrocarbons sprayed by injectors onto the backs of the closed inlet valves will invariably be absorbed and transformed by heat into additional activated carbon residue.
Personally, I buy Top Tier gasoline because it has more detergents than bargain gasoline.
It might make you feel good but the car couldn't care less.
FWIW higher octane fuel in not a better fuel, it just has a higher octane rating number, and it does accellerate carbon build up.
OK my car does not run good on low octane with an 11.5 compression ratio. I'll step out now!!
The OP's car is 9:1, like all '84s. That's the difference.
1984 crossfire fuel injection (sort of) I assume the proper gas for this year is 87 Octane. Don't have the owners manual and the service manual does not seem to address this issue. Comments please
Just me its a Corvette it gets the best!! Just part of owning a sports car.
OK my car does not run good on low octane with an 11.5 compression ratio. I'll step out now!!
Did mean to start a disagreement.
Using higher octane fuel than is needed will only get you slightly faster carbon build up.
FWIW higher octane fuel in not a better fuel, it just has a higher octane rating number, and it does accellerate carbon build up.
I'm sure you meant 'didn't' mean to start..........
Never heard that one before. Why would this happen? We know that millions of drivers use higher octane fuel than required thinking 'it's better' but I've never heard about it causing carbon deposits.
Funny thing, most pumps around here have only one hose, so the first gas coming out is what the last person used, almost always regular (87). Being "topping off" a fuel tank that is only a few gallons total is probably 50% or more regular fuel.
But additives has nothing to do with octane rating- the OP's sole question.
We just need somebody to mention ethanol and we'll have the gasoline trifecta. :ugh