GT2 gas mileage and power loss

gt2dewek

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2018 STINGER GT2 gas mileage and Power issue

So a while ago I used to run e30 on my car and was going good until I used some sketchy e85 and got a check engine light after, everyone said to empty the tank and refill with premium had again which I did, ever since that I felt like my car has had a loss of power, doesn’t feel like it runs like it used to and just recently my gas is going by quick. my daily drive to my job which is around 30 min or less uses up a full line of gas and I’m averaging 28-35mpgs which is weird because I’ve driven to Long Beach which is a little over an hour away with less than a line being used. Gas used to last me a week and a half and now I’m having to fill up every 4 or less. Along with the loss of power.


Mods: injen intakes, HKS bov, JB4

HKS spark plugs
Straight piped
 
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