GC at BMW dealership?
Since I'm a BMW master tech. at a BMW dealership, and I know that the synthetic oil we use in the bimmers is Castrol, I'm curious if this is the same GC everyone is talking about. It's 5W30 that we use, but all of our cars go 15-17K miles on oil changes, so it's gotta be good stuff.
If this is the case, then the ultra hard to find GC is as easy to get as a trip to your local BMW dealership.
I'm changing the oil in the TA today, and I'm going to use the 5W30 that we use in all of our bimmers........I'll get an oil analysis done in 4K miles and let you all know.
Well, I guess I'll run this for 4K miles and do an oil analysis. Switch to GC on the next change. BTW, my car sounded like somebody beating the inside of a trashcan with a bat on cold starts with the mobil 1 in it.
I'll repost with the noise on this oil tomorrow morning.
I used a Mobil 1 filter......anybody have any input on these?


