11-26-2017, 09:43 PM | #1 |
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Anyone running 5W-40 Oil yet? + UOA
Anyone running 5W-40 oil yet? In prep for a track day I decided to finally DIY an oil change with Motul 8100 X-Cess 5-40 which is my go to oil for DD cars. It’s LL01 certified as wel.
Car seems to be much smoother as anticipated with fresh oil now to see how it holds up. Going to do a UOA with the dealer provided oil that was done for the 1200ml service. The oil came out much dirtier than anticipated for the OCI but normal for DI BMW engines I suppose. 300V held up buttery smooth on my FA20 so we’ll see how this one holds up after a few track days. Will update with UOA once results are back.
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12-28-2017, 12:13 AM | #2 |
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I'm running Motul 300V 5W-40. So far so good. Have done several track days as well. Planning to send in for analysis since I'm only 1700 miles since changed. Normally go 5k intervals. I'll keep you posted.
Update: got my analysis back from Blackstone. Looks like the motul 300v 5w-40 is holding up really well. He mentioned the oil looks great and to think of extending interval by 1500 but I think I'll stick to the 5k with the track days. Planning a few more track days so I'll get another sample at the end of the 5k interval to see how it's holding up.
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12-28-2017, 07:30 PM | #3 |
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I was running liqui moly 5w-40 until my 10k dealer oil change the other day. I felt no difference between it or the 0w-30 the dealer put in or the 5w-30 at the 1.5k interval.
I switched to 5w-40 as I did my own oil change around 6k and for the "added protection" during so cal summer/fall track days. |
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FSociety3812.50 nioh_lbbm21716.50 |
01-10-2018, 10:15 AM | #4 |
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Guys - these engines are designed for low viscosity oils (e.g., 0W-30). BMW engines, in particular, utilize oil for several functions (double VANOS, turbo passages, etc) and the flow rates are affected by a thicker viscosity which will alter flow rates, depending on temperature and passage size. I recently received a recommendation from a racing engine builder on this subject and his response was - BMW is very specific about oil viscosity and I would stick with their recommendation.
Given they ran 10W-60 in the S65 V-8 and S54 I6 from the factory, they aren't doing it for fuel economy reasons. It's around engine design and best protection/efficiency. It's your engine but factory recommendation is important - for instance, Jeep/Chrysler warns that their cylinder deactivation in the V-8 Hemi will not function as-designed unless you use the factory-recommended 5W-20. My $.02 |
01-10-2018, 11:29 AM | #5 |
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I agree with what your saying. Stick with BMWs recommendation. They recommend LL-01 oils and the 5w-40 oils mentioned in this thread so far have the LL-01 certification.
Other oils with 0w-30, 0w-40, 5w-30 and 5w-40 weights are on the list. |
01-10-2018, 11:36 AM | #6 |
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0W-40 for me. You’re only handicapping yourself and potentially harming your car by running 5W-30 or 5W-40. Last edited by ZM2; 01-10-2018 at 09:40 PM.. |
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02-03-2018, 05:30 PM | #7 |
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OH MY
"0W-40 for me. You’re only handicapping yourself and potentially harming your car by running 5W-30 or 5W-40".
. . Check the NOACK of your 0W-40, bet it is higher than let's say the BMW OIL 5W-30 or better yet PP EURO 5W-40. Matching your viscosity to the environment in which you drive is a good recommendation. 0W only for the really cold temps say below 20F. Cheers |
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02-04-2018, 12:05 PM | #9 |
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5W is too thick at low temps. I would only use it if I lived in a very warm climate or as a summer oil.
Last edited by ZM2; 02-04-2018 at 01:16 PM.. |
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02-04-2018, 07:15 PM | #10 | |
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There's a huge gap in knowledge and research when it comes to oil. Transmission, diff and engine oil alike. |
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02-05-2018, 07:13 PM | #11 |
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Viscosity Curves Don't Lie
Data shows that unless you see start-up temps below 10F there is really no engine wear advantage in using a 0W syn oil over a 5W syn oil. Fuel savings could be small. OW oils have a purpose and would be a great choice in winters where the average start up temp is 10F or less.
. My morning garage temps seem to range around 35F-45F (Jan-Feb) so a 5W-30 works best . 5W-40 oil outside of winter. I could use a thinner oil say 5W-30 but my oil temps are 225-240F . Since oil viscosity is measured at 40C & 100C I know my oil at 230F is less than a 40 weight. Then throw in a little fuel dilution (found in DI cars) and I have a light 30 weight oil once I am at operating temps. . So every case and location can be different. |
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02-06-2018, 07:47 AM | #12 |
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5W viscosity is already significantly higher at 30F than 0W. My garage doesn’t get that cold, but there are many days in the winter where my car will sit outside for a while and temps will get down to 10-15F.
Just watch how the 5W-40 pours in the video at low temp. That’s too thick for cold starts. 0W for anything below 35F and 40W for track duty provides the most protection at the extremes. |
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02-06-2018, 07:25 PM | #14 | |
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Plus, pour 5W at 30F or 20F, outside of the typical vis curves, it’s thick and slow. It just doesn’t make sense to use it at low temps. There are no benefits. Last edited by ZM2; 02-06-2018 at 07:31 PM.. |
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02-07-2018, 06:01 PM | #15 |
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-7F to -9F Video Temps
Agree - at your 15F Temps I would be all over 0W-30.
. Here in Bama I just stick with 5W-30 BMW oil and or M1 ESP 5W-30 in the wife's vehicle 3L diesel. . . |
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03-09-2018, 11:16 AM | #16 |
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I'm not an oil expert my any means, but a lot of people that use higher weight oils in cars with DI equate higher weight with added sheer protection from fuel dilution.
That is NOT how it works. Viscosity can be effected by adding fuel dilution, but the biggest part of that equation is the additives that a particular manufacturer uses. Base synthetics (assuming you're running a true synthetic) are generally the same. Kind of like gasoline companies, the only differences are the additives and detergents that they use. Now, this isn't 100% the case, but is largely indicative of the market. So, the point here is higher weight (viscosity at temp) =/= higher fuel sheer resistance. Unless you're in an arctic environment, or driving in the desert in Abu Dhabi, don't change your viscosity. Edit: especially the case with very tight bearing tolerances *coughBMWcough* like the S85, you will ensure that you have very little flow through channels and between bearings. |
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03-09-2018, 02:25 PM | #17 |
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I'm going to keep it on spec for now. But I wonder if I could switch to a thicker oil later down the line. Over here temps never go below like 80F, especially during the day. So I don't think there's much point to a lighter oil.
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03-28-2018, 10:02 PM | #18 | |
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05-28-2018, 04:12 PM | #19 |
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Living in austin Texas, using pp 5/40
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06-06-2018, 12:37 PM | #20 |
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I picked up some BMW Twin Power Turbo LL01 5W-30 for my '18 before I realized that they changed the owners manual. Now this thread and the others are making me paranoid Blackstone suggested I change the oil around 3500 miles. My next change will be at the dealer in like 5 months so I'm thinking I should just go ahead and put it in since it's garaged in Sunny SoCal and there weren't any engine changes for the LCI (as far as I know). You all think I'm good here?
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06-11-2018, 03:12 PM | #21 |
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I just tossed in PP Euro 5w-40 last week. I have one track day done and another planned for this weekend. I am at 3k miles now so may change at 5k after these track days.
On a side note, I did notice after the change to the 5w-40 that the car's idle is a little more pronounced as far as feeling the car shake a bit more. Not sure if its coincidence or me just being paranoid. Any of you notice that after the switch? Feels almost like how a V8 would feel and not sure that is whats in line with most people say on how smooth these engines are. |
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06-11-2018, 04:12 PM | #22 | |
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