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bump.
do we know when chevron officially switches from winter to summer blend?
i have logs going back to February when i was initally data logging for my 91/91wmi/94/94wmi tunes. everything was great and since then i even had revisions done.
recently on my straight 94 tune ive noticed a little hesitation (seems to go away with wmi) so i did some datalogging, and my car is running significantly less timing and is starting to see knock (can post datalog screen shots). i had low fuel yesterday afternoon, thought maybe that was the cause. filled up last night and on the way home still had timing being pulled etc
94 from 5 and bridgeport chevron. not happy about this at all
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