Cadillac Owners Forum banner

vacuum leak

  1. 95 Eldorado: MPG diagnosing/ Aftermath of overfilled trans

    Cadillac Seville / Cadillac Eldorado Forum
    95 etc 126,000 miles. Trans was overfilled by about 2 gallons and drove from Chicago to Philadelphia (about 900 mileds). Car burned and smoked oil until I eventually pulled out excess trans fluid. Prior to trip car was getting a 400 mile range on the tank and 24-28 hwy MPG. Is it possible that...