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Tune

oohhh...ok. because i have the race tune that came in the tuner installed and i use 89 octane.
Read your manual, but I suspect I already know what it says...

You need to use Premium fuel if you are going to use their canned performance tune.

Some of them also have a tune for regular fuel - check your particular situation. You will probably have ping and issues if you run the premium fuel tune on regular gas.
 
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