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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N55 Turbo Engine Tuning and Exhaust Modifications - 335i Tuning > What Motor Oil and grade do you have in your 335i?



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      03-05-2017, 04:31 PM   #23
bbnks2
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Originally Posted by AirbusPilot View Post
All I can tell you is the oil temp runs about 5 degrees cooler. I change it at about every 6k miles. Did not know that about the M1 new formula, just read a comparison test where it out performed the old formula.
Mobil 1 0-40 used to be slightly thicker than Castrol Edge Euro 0-40. It is now thinner. It makes sense the new formula would decrease oil temps. Problem is it does not appear to hold up well to abuse. I'd stick with LL-01 approved oils if you do anything more than use your car for commuting/fuel economy. I would drop your oil change intervals down to 4-5k max.
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      03-05-2017, 05:10 PM   #24
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Originally Posted by bbnks2 View Post
Mobil 1 0-40 used to be slightly thicker than Castrol Edge Euro 0-40. It is now thinner. It makes sense the new formula would decrease oil temps. Problem is it does not appear to hold up well to abuse. I'd stick with LL-01 approved oils if you do anything more than use your car for commuting/fuel economy. I would drop your oil change intervals down to 4-5k max.
Sorry, I wasn't clear. I have only I used Amsoil 5w40. I was thinking of using M1, but not now.
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      03-05-2017, 05:46 PM   #25
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as long as you stick to 5w40 you'll be fine. 3000 mile oil changes are a bit overkill, but better sooner rather then later I guess?
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      03-05-2017, 07:26 PM   #26
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Not for the BMW, but several uoa's I had from my Z06 looked fantastic.
I believe it. Would nice to see an amsoil uoa on an n55 just to compare it to my motul xcess uoa.
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      03-06-2017, 01:47 PM   #27
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I haven't seen an amsoil uoa but I'm planning on doing one for Castrol Edge 0w-30 after 4-5k.

Last edited by flexinator; 03-06-2017 at 02:13 PM..
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