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Dano88GTA 07-30-2017 01:59 PM

What gas should I be using in my 88 GTA 5.7?
What octain?
With or without ethanol?
What manufacturer?

Firegoose 07-31-2017 08:24 AM

Re: Fuel
I think it starts to come down to availability to a point, what gas stations are near you or the most convenient for you. Unfortunately ethanol is becoming almost standard across the board it seems, so it gets hard to avoid it. I just always try to use the highest octane I can get from a pump, here thats ultra 94. I figure cause I don't drive it too often, as octane decreases as it sits, when I do drive the car the octane won't have fallen to 50. LOL

DynoDave 07-31-2017 08:05 PM

Re: Fuel
While my lowly T/A has an even more lowly L03, it is 9.3:1 C/R. And I think that's pretty on par, if not even a touch higher, than the L98. I use 87. Runs fine. If I know I'm going to be stuck in some really hot conditions, I might go 89 or 92, but most of the time regular gets the job done.

MunsonGTA 08-02-2017 03:35 PM

Re: Fuel
87-94 octane would be fine.

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