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Old 10-13-2018, 04:40 PM   #11
Scooby Specialist
Member#: 468393
Join Date: May 2017
Location: PDX OREGON
2017 STI


Originally Posted by Bananana View Post
Im not familiar with octane boosters as i have never used them, is it ok to use on quarter or less tank, just so it doesnt linger in the fuel tank for too long. The last thing the car had replaced was a drop in filter from cobb, same filter as old one because it got dirty, chances of that being the culprit imo is really small, but who knows....
Here's a mix chart.
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