I use only synthetic oil - and at every other change, I do use BG44K. It's a GREAT fuel system cleaner.<quoted text> Possibly.. Let me ask you what type of oil are you using? I personally have not had this problem.. Possibly wrong oil.. appears to be viscosity prblm.. First rule out fuel system contamination.. Not sure.. will ck on for you.. I use lucas fuel injector cleaner every 1500 miles and in addition I am going to start using ZMAX.. If the C. Shelby can endorse product and use in the 700 horsepower Super Snake.. I am going to use in my HEMI.. Basically penetrates down to metal.. is actually absorbed into the engine metal parts.. conditions the engine.. makes sense.. Anyway.. fuel system cleaning, throttle body cleaning, and very the type of oil that you are putting in vehicle.. then ck exhaust system.. but I am assuming that smoke coming from engine.. If so may possibly be a engine seal leak. Okay.. Peace
Speaking of tranny: No more than every 30,000 - FLUSH the fluid (not a drain and fill - actual FLUSH) to replace all old fluid.