try some good fuel injestion cleaner. Maybe the last owner didn't use any. I know this sounds stupid but try it & super unleaded
Its the Techron complete fuel system concentrate, BMW and GM both sell their own brand in the same exact looking bottle.last question is I see there is many different kinds of chevron fuel cleaner which mo del is the one gm relabels?
The stuff costco sells is not the concentrate, its a product intended to use at every fill up at about 1/10th the strength.I just bought a case of Techron at Costco. 6, 16 oz. bottles for $16. That should last Black Betty for the next 40K miles or so.
True, it is not the concentrate and the box says to put a bottle in every 1,000 miles.The stuff costco sells is not the concentrate, its a product intended to use at every fill up at about 1/10th the strength.