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Old 06-20-2019, 05:39 PM   #5
Turbo, what?
klr142's Avatar
Join Date: May 2004
Location: OR

Originally Posted by thelostartof View Post
The car sees only E54-E70 fuels with a gallon of 91 pump every 3rd tank to help keep things clean.
That seems like a relatively large range of octane on your fuel if it's not exactly one number. I've also heard that what pumps advertise the fuel being doesn't necessarily mean it is what you're getting. If you tuned for something specific, you might end up having problems when the next tank is not quite as high a mixture of ethanol.

You probably already know this and for all I know, you may have a sensor or something that is helping you or your engine management keep an eye on it... but I figured it was worth throwing out there.
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