Originally Posted by
BMWCurves
Don't our cars have perfectly good knock sensors to help prevent early detonation? I feel like that's a pretty poor oversight if not and would assume you would have seen or heard of more BMWs having this issue given how many cars were sold.
they do have knock sensors, however they are not designed to be run on less than 91 octane for prolonged periods of time. it says right in the manual, also i believe on the backside of the gas fill door, too?
whatever the reason, the manufacturer states to use 91 or bad things will happen. not worth the risk.
OP - are you having the replacement engine done at another shop? please tell me you're NOT paying $6000 to have this done!
peter
2004 330i ZHP
2005 330iT ZHP
2010 328iT M Sport