Quote:
Originally Posted by Ctopher
So would you drop down to 90 octane with no ethanol for a non-daily driver old/modern car?
CTopher
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My '47 Dodge truck and my '56 Porsche coupe get 90 octane 0% ethanol. The cam/compression in the Speedster won't allow 90 octane. The last time I had it down I added a couple of shims to lower the compression, but not enough. My 93 is tuned for 93 octane, so both the Speedster and the 911 get 93 octane w/ethanol.