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01-13-2020, 03:40 PM | #1189 |
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What's your (& other people too) guess as to why BMW stipulate 10w/60?
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01-13-2020, 06:45 PM | #1190 | |
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But if you are not doing either, I don't see why you couldn't run a thinner oil for every day use.
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01-17-2020, 01:22 AM | #1191 |
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Afraid I haven't got time to read the whole thread .
Yea I guess the track use point makes some sense, but I don't really see how the change interval can be a reason seeing as plenty of 0/5w-30/40 oils can do 15k OCI. BMW not doing 15k changes anymore? |
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04-08-2020, 09:06 PM | #1192 |
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04-09-2020, 07:51 AM | #1193 | |
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I mean it can be like that for the most time you was using 10-60 and what happen after switching to 0-40 it's just coincidence |
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04-09-2020, 10:12 AM | #1195 |
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I probably would not run 0W40 on the track. But I think the person who posted the video and claimed the engine failure was due to 0W40 is probably just trying to make a joke since there is no specific information.
On the street, I have run mostly 0W40 since 2014, over 40,000 miles. Once or twice I ran 5W40 and once I ran 5W50. The range of ambient temperatures in my area is -20F to 100F. If I lived in an area that was always hot, I would probably use a thicker oil. |
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04-12-2020, 08:06 AM | #1196 |
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Err, what's that in real temperature?
Hmm, -29C to 38C, bloody hell that's a wide range of extremes! And yea I was thinking that video was posted as a joke too .
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. Last edited by Assimilator1; 10-03-2020 at 12:12 PM.. |
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06-05-2020, 09:04 PM | #1197 |
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I was on Mobil 1 40 for about 1 year on street driving then decided it was time to take it to the track. I changed the oil before track day with mobil 0w 40 and the weird thing was when i went to start it after the oil change i heard metal on metal sound. i was like wtf, but brushed it off as my imagination oh how wrong i was. THis was original rods about 40k miles when it blew. That day on track the temperture was 50-55 degrees and i havn't driven this car on track for a few years.
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06-09-2020, 01:11 PM | #1198 |
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I've run 0W40 on track many times on stock bearings but I prefer to mix in some 15W50 from Walmart. I now run 5 quarts of 15W50 with 4 quarts 0W40 after BE Bearings.
Will switch to 5W50 when it's on sale at NAPA. EVERYONE should be using the Mobil 1 quarterly rebate too. .
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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06-09-2020, 01:20 PM | #1199 |
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Probably foolclear’s motor already had issues unrelated to the use of 0W40. It’s factory fill oil for the 911 GT3, another high revving motor.
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06-10-2020, 01:28 PM | #1200 |
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I don't think 0w40 is a good idea for track use. Not sure why people aren't just sticking to 10w60, the car was designed for it. That's what I've been running and no issues/reason to change.
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06-16-2020, 12:37 PM | #1201 | |
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It's almost like different engines are different. I doubt my engine would stop consuming Mobil 1 if I punched it out to 5.5 liters and hung two turbos off the side, but you never know I don't run this stuff on my S65 anymore because the consumption is so bad compared to other oils. It's obviously getting past the rings or otherwise being consumed at a higher rate, for whatever reason, which I don't like, because I'd rather burn gasoline
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06-16-2020, 03:53 PM | #1202 |
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Could be ring seal on the pistons is looser on the S65 and thick oil reduces consumption. I consume oil with 0W40 but consumed 10W60 as well. I should try measuring with 0W40, 5W50 and 10W60 but I don’t drive enough so it might take me 2 years to do 3 5000 mile changes.
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09-06-2020, 01:39 PM | #1203 | |
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If a dealer hasn’t heard about the rod bearing issue, I wouldn’t classify them as a “very good dealer” You should also ask them about the throttle actuator issue. |
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10-10-2020, 12:07 AM | #1204 |
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Anyone tried mixing M1 15w50 and 0w40?
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10-10-2020, 06:43 AM | #1205 |
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Sure. I mix 0W40 with 15W50 or with 5W50 if I have some of the thicker oil. During the last couple of years I have found good sales and have been buying it regularly. I don’t have any data or documented results though. I simply use 3L of the thicker oil with 6L of the 0W40. I also did a full change with 5W50 last year.
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10-18-2020, 01:30 PM | #1206 |
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Yep. Been mixing them for years. Blackstone reports are all good at 7,500 intervals.
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Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."
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10-19-2020, 08:06 PM | #1207 |
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My final verdict on oil viscosity is at 25-30C ambient temperature, 10w60 likely has nearly the same viscosity as mobil 1 0w40 at around 0C, so during summer time I would use 10w60 with the correct HTHS of 5.2. During the winter however, no one is really going to put high shear stress on these oils unless you are rallying your car so 0w40 makes sense in terms of oil flow for protection.
If you are running 0w40 in the winter for oil flow purpose you should have no problem using 10w60 in the summer because the results will be similar. (consider two exponential curves each named engine protection and oil viscosity and there exists an optimum where a thin oil&low HTHS loses out to a thick oil&high HTHS) For the record, engine load gets substantially higher after 6000 rpm so I would not rev out the engine too much without the engine oil with correct HTHS. These engines are designed to run 120C when driven hard and that has little to do with bearing clearance but more has to do with heat efficiency around which the engine was designed (a stable, higher temp engine is generally more power efficient- look at F1 engines exhaust temperature) so 10w60 is the right choice for warmer times of the year.
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12-15-2020, 12:26 PM | #1209 | |
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Another reason some like to run the 0w40 is to reduce wear on the rod bearings. The original rod bearings have a very tight clearance and some feel the 0w40 does a better job squeezing in and lubricating the bearings.
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12-21-2020, 02:08 PM | #1210 |
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Roger that on OEM bearing clearance.
Down to 10k OCI now? Interesting.
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Oil analysis for finding wearing rod bearings?. Collation of oil analysis reports with some rod bearing photos for the M3's S65. My categorisation of pulled rod bearings in the rod bearing condition thread. My updated 'Blown engines' list. |
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