Reply With QuoteDo you have limited slip or not? yes, pick the RP75w140, no, the 75w90. I've found that equivalent products in Mobil 1 are too thin and induce groan.
Major Contributor
3 Grand Master
Do you have limited slip or not? yes, pick the RP75w140, no, the 75w90. I've found that equivalent products in Mobil 1 are too thin and induce groan.
Grand Master
You'll want 75w90 and you'll want to pick up either Royal Purple or Amsoil.
Reminds me I need to put the Amsoil in mine I've had for a bit. PO put RP in it which is why I'm in no hurry to change it out to the Amsoil. If it was something else in there I'd have changed it out to the Amsoil sooner.
Cosmos Black/Black 1995 540iA M-Sport
BMW Individual Exclusive Edition, 1 of 65 total, 9/25/95 Build
Major Contributor
as far as the weights of the oils go I know which one I need... I am just not sure on the brand
I love Mobile 1 but I am starting to hear so bad things about them =/
I have yet to hear anything bad about RP besides the price
Grand Master
You only need to pick up 2 quarts, and you don't need to change it very often so spend the couple extra $ on the RP or Amsoil. The RP has worked very well in my M-Sport and I'm sure it's one of the contributing factors to the high MPG I see in highway use (29.5 MPG highway last I paid attention).
Cosmos Black/Black 1995 540iA M-Sport
BMW Individual Exclusive Edition, 1 of 65 total, 9/25/95 Build
Major Contributor
cool Bubba...I think I will go with the RP as well...Originally Posted by bubba966
Do you anything about their Tranny fluids? I was going to get Mobile 1 but now that I have been hearing sooo many bad things about them I am reconsidering it =/
Grand Master
I agree with Bubba about RP. I've got it in my M-Sport along with my son's '91 318iS and it's great. Compared to RedLine, it was really, really close. We just can get Redline locally anymore. But there's lots of good things they are saying about Royal Purple.
Major Contributor
I was going to go with Red Line initially but I researched that too and some were saying that the diff started to make noises during turns...so they had to add additives to the red line diff oil to make it better....
It seems like the more I research the more confused I get...so ironic! hahaha
The only thing that I know now for sure is that Lemforder is amazing! haha
Still lost regarding the tranny fluid too JR M5...like i mentioned to budda...i was going to get Mobile 1 but I read some bad stuff so now I am back to square 1 =(
why can't lemforder just make everything! haha
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