Re: Help Engine sludge. what to do?
tlkchew;447528 said:
I dont know if its the engine problem or the previous owner. the cars got only 80k on it, i have driven 20k on it myself and religiously change oil at 10k intervals.
it is possible that the previous owner followed PML's recommendation of servicing every 25k?
Well even if he did service it every 25k km, he was just doing it based on PML's (and BMW's) 'then' recommendation.
I never agreed with that too.
I have challlenged PML many years ago (when they were still on interval-based servicing) like such:
"How can BMW apply an across-the-board 25,000 km oil change interval, when the breakdown of lube oil to sludge / acids, is dictated by the way individuals drive their cars, the RPMs they average and not just based on cummulative mileage?
BMW makes cars and even if they test their cars using a certail lube oil brand, how can they guarantee the life of the lube oil up to 25,000 km, when the manufacturer themselves, of the synthetic lubes, only guarantees theirs up to 10,000 km?
You make the oil, or I make the oil?"
(well, by that, you'd have guessed rightly that I work for an oil major!)
It was like a personal battle won, when after many years, BMW has finally and officially (in 2009) announced world-wide that they have reduced the recommended lube oil change intervals to 15,000 km (first) and later, down to 10,000 km.
At last, BMW has come to their senses. :nutkick: