Quote:
Originally Posted by arpad_m
You don't want your LT1 engine to see anything below 93 octane, otherwise your ECM tune will drop down to its low octane table, the engine will lose some power and be more prone to detonation. Don't do it. If you can only get 91, then sure, use that (and curse your state for not offering you at least 93), but 87 should be out of the question.
100% 93 octane is a unicorn, I've never seen it at any gas station, so I'd suggest that you stick with regular 93 that has 10% ethanol. The car is set up for this fuel. Running something with less ethanol will technically improve your fuel economy, but only a tiny bit, it's not worth the typical $0.90 to $1.10 surcharge.
High octane race fuels will not help your engine much either: as long as the high octane table is being used and there is no knock, the engine is operating under ideal conditions, adding more octane while still running the stock tune doesn't help (it can even be inferior as it can slow down combustion).
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Jeez is it that bad?
I mean 93 here is like toilet paper availability.
We also have a common selection of E85 as well.