BMW 6 Series - Tech Talk E24,E63,E64,F12,F13
on another forum a guy had a smoky exhaust due to most probably worn Valve seats he was informed by an Indy BMW garage to use a different oil type - 10W 60 in this instance it put an end to his smoky exhaust, My question is is this oil going to do my engine harm, or is it worth a go, i have a...