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Had the car to the dealership today for a recall involving reprogramming of the body control and powertrain control modules. They checked for the chugging I complained about but couldn't find anything wrong, probably because that problem has largely been resolved since I added the fuel...

Got it and thank you for taking the time to advise!

I have run about 1 and 1/2 tanks of high octane gas thru. So far no difference. Before though I was using regular octane gas. I do think when it chugs initially, it sounds like the fuel injectors (although I know next to nothing about engines)! Thank you for the input. How many tanks of high...

thank you

Haven't noticed anything unusual about the smell or color of exhaust gas.

I have a 2023 Bronco Sport 2L Limited Edition Heritage model. Despite the weather or season, the car chugs a bit when first started if the engine is cold. It only does it for probably less than 1 minute. Is this normal!? I have tried 2 tanks of high octane gas with no effect. Thanks for any...