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BMW 3-Series (E90 E92) Forum
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Motul 5W-40 Oil
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12-27-2016, 08:24 AM | #23 |
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You should try Castrols high mileage version. It's a lot better and it reduced how many times I had to top it off. https://www.walmart.com/ip/181963394...263094&veh=sem
Plus it's $26 for 5qts from Walmart |
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12-27-2016, 09:10 AM | #24 | |
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With that said however, seeing as how you have an N52, -30 is obviously most ideal for you as it's specifically designed to operate at 200F-220F efficiently. Whereas -40 is designed to operate (N54/N55) at 240F-250F efficiently. However (in case there might be a less knowledgeable member reading), depending on your vehicles spec, a higher 5-XX number does not always equate to outright "better" performance, with the exception of -20 (which is simply trash) for obvious reasons. Reason being is because a thicker oil takes longer to get to operating temperatures and when doing spirited driving, just as how it takes longer to warm up, it takes longer to dissipate heat as well. -40 wouldn't necessarily hurt, but just keep the aforementioned in mind. That's why many M3 owners opt for a -50 or even -40 for track days, as the OE spec -60 can cause oil temps to stay hot for far too long. |
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12-27-2016, 10:23 AM | #25 |
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6IX-F10-N52: Please read these and then review your posts.
https://bobistheoilguy.com/motor-oil-101/# and https://bobistheoilguy.com/putting-t...nto-viscosity/ |
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12-27-2016, 10:50 AM | #26 | |
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bottom line, the N52, N54/N55 all recommend you use 5w-30/5w-40, and that these weights are safe to use in all weather conditions (owners manual) being that my car is stored in a heated garage, I see no use in adding oil not specified by BMW. also, the thing you mentioned about the m3 guys - wouldnt a thicker oil weight lower temperatures? I noticed a reduction in oil temps when switching from 30 to 40 weight. |
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12-27-2016, 11:19 AM | #27 |
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Fundamental physics....
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12-27-2016, 01:00 PM | #28 | |
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For everyday use, yes you're right, you will notice generally lower oil temperatures (-60), that's why it's the recommended oil |
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12-29-2016, 08:40 PM | #29 | |
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0w-20 will not offer the same protection compared to 5w-20. |
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12-29-2016, 08:45 PM | #30 |
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Heat resistance would be the same but 0w would offer bettet lubrication when cold so 0w-20 would be better choice.
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12-29-2016, 10:09 PM | #31 | |
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That's where your logic is taking you. |
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12-29-2016, 11:28 PM | #32 | |
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You really need to read the references I and others have given you. Last edited by floydarogers; 12-29-2016 at 11:38 PM.. |
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12-30-2016, 12:17 AM | #33 |
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He is just too busy sharing his wealthy knowledge in other threads such as "dirty oil causes rough idle", kind of knowledge. So he doesn't have any time to listen to any of us.
Like he said though, he has the fully calibrated 8th sense and is capable of visual analysis of oil shear, so leave him be. /checkout |
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12-30-2016, 06:46 AM | #34 | |
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12-30-2016, 11:25 AM | #35 | |
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if you guys have nothing better to do but argue oil weights on this forum as if it hasnt been done 50 times already, go elsewhere. I want to know which brands of 5w-40 oil is good. what do you guys think of liquid moly for the fourth time, BMW specifies 5w30 or 5w40 oil for these engines. I wont be using anything else. |
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12-30-2016, 12:45 PM | #37 |
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yea jesus christ, if i hear this BMW approved shit one more time im going to flip. bottom line, if you do research the n52, n54, n55 all specify that 5w-30/5w-40 is suitable for all weather conditions and I dont think anything else should be used.
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12-30-2016, 02:37 PM | #38 | |
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12-30-2016, 03:18 PM | #39 | |
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12-30-2016, 03:38 PM | #41 |
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Ok so,so, sorry oil gurus!! Do I write that 5W30 or 5W40 should be any kind of a problem? Just woundering why use a castrol VW approved 5W30 oil when there is a BMW approved oil in 5W30 frome castrol. But everyone do what they want. Sorry if I did someone upset.
Last edited by Gaspo; 12-30-2016 at 03:53 PM.. |
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12-30-2016, 03:41 PM | #42 |
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12-30-2016, 04:00 PM | #43 |
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12-30-2016, 05:38 PM | #44 |
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Interesting to note that some 0w-30 and 0w-40 actually outperform their respective 5w oils @ 40c and 100c, as in their viscosity is actually thicker.
Of course, being opposed to 0w, you wouldn't be interested in these magical oils. |
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