what octane do you use on your stock 2.4 engine? (and ethanol?)

I burn premium ethanol...and add a couple ounces of Startron to every tank full.

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Originally Posted by FL-Frank

I burn premium ethanol...and add a couple ounces of Strartron to every tank full.

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do you have the stock compression ratio?

If you live in Boulder, you can use regular, octane demand drops with altitude. At sea level and hot weather you need premium to be on the safe side. At least I do. As hot as it gets here in Texas, and here it can be 95 in December today and 35 the day after, I find it safer to stick to Premium. Probably overkill, but cheaper than a hole in the piston.
And I have 8.5 to 1