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Thanks everyone I’ll forsure step down from the Octane booster , I have fresh oil and plugs otw so I’ll be checking all that. Off the SCT gauge off some WOT pulls it hit about 20 plus pounds of boost. So I wanted to be safe and change the plugs. I always stick to 91 since I’m in California smh...

Hello everyone I’m new to the group and im Hoping someone can give me some advice. I have a 2019 ranger with under 30K miles I’ve had for three years now. It’s been great and never given me a issue. About a year ago I added a base 91 octane tune from SCT with there tuner , and I added a injen...