Originally Posted By: Hessam
in my O3 330xi, I definitely noticed noisier engine after switching from dealer serviced M1 5W-30, to M1 0W-40. wasn't going to be anal and dump it less than at least 5-6K though to switch over to GC, but I did have a few quarts of BMW 5W-30 in the trunk from the previous owner. Engine used about a quart and half after 4500 miles, at which point I added a quart and half of the BMW 5W-30 and it completely quieted the engine. who knows why, maybe the moly in the BMW 5W-30. I'm not even sure if Moly has a "quieting" effect on engines, but it worked in my case.
Got 8 quarts of GC I picked up on sale with free bosch filter from autozone lined up for next oil chang in couple weeks, and we'll see how that goes compared to M1 0W-40. But if I every find a great deal on M1 0W-40 and go back to that, I will definitely use it with a quart or two of the BMW 5W-30.
Same experience here, my 325 motor developed a startup noise (likely lifters) during the first couple minutes of the day on 0w-40, not that it was "bad" necessarily. That said I tried M1 TDT and no more tapping noises, so I stuck with it since. That was about 25k miles ago.
The M54 is a beautiful, smooth-sounding motor, so anything that takes away from that is easily noticed (and "must" be addressed!).
in my O3 330xi, I definitely noticed noisier engine after switching from dealer serviced M1 5W-30, to M1 0W-40. wasn't going to be anal and dump it less than at least 5-6K though to switch over to GC, but I did have a few quarts of BMW 5W-30 in the trunk from the previous owner. Engine used about a quart and half after 4500 miles, at which point I added a quart and half of the BMW 5W-30 and it completely quieted the engine. who knows why, maybe the moly in the BMW 5W-30. I'm not even sure if Moly has a "quieting" effect on engines, but it worked in my case.
Got 8 quarts of GC I picked up on sale with free bosch filter from autozone lined up for next oil chang in couple weeks, and we'll see how that goes compared to M1 0W-40. But if I every find a great deal on M1 0W-40 and go back to that, I will definitely use it with a quart or two of the BMW 5W-30.
Same experience here, my 325 motor developed a startup noise (likely lifters) during the first couple minutes of the day on 0w-40, not that it was "bad" necessarily. That said I tried M1 TDT and no more tapping noises, so I stuck with it since. That was about 25k miles ago.
The M54 is a beautiful, smooth-sounding motor, so anything that takes away from that is easily noticed (and "must" be addressed!).