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      12-03-2019, 06:33 AM   #1189
pbonsalb
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I totally agree that thicker oil is usually best for track use. I’d probably run the factory spec 10W60 if my car was a track car. But my car is a street car. Probably over 90% of M3s will never see the track.
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      01-13-2020, 03:40 PM   #1190
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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   #1191
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Quote:
Originally Posted by Assimilator1 View Post
What's your (& other people too) guess as to why BMW stipulate 10w/60?
This was mentioned much earlier in this thread but BMW most likely used 10w60 because of the long oil change interval they were doing at the time the M3 was introduced (15,000 mile oil changes). They also do it because they want the engine to hold up to high track temperatures that the engines get exposed to.

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   #1192
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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   #1193
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Here is the result for running 0w 40 on track
Enjoy!


https://www.youtube.com/watch?v=27DSRczeocI
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      04-09-2020, 07:51 AM   #1194
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Quote:
Originally Posted by Foolclear View Post
Here is the result for running 0w 40 on track
Enjoy!


https://www.youtube.com/watch?v=27DSRczeocI
But at first. How long are you on 0-40?
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, 08:01 AM   #1195
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What is the oil was? Mobil 1?
How long are you on 0-40?
How long ago you have changed your rod bearings?
Which temp was on the video?
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      04-09-2020, 10:12 AM   #1196
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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   #1197
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Err, what's that in real temperature?
Hmm, -29C to 38C, bloody hell that's a wide range to extremes!

And yea I was thinking that video was posted as a joke too .
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Collation of oil analysis reports with some rod bearing photos for the M3's S65 - Does oil analysis work?
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      06-05-2020, 09:04 PM   #1198
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Quote:
Originally Posted by RomanK View Post
What is the oil was? Mobil 1?
How long are you on 0-40?
How long ago you have changed your rod bearings?
Which temp was on the video?
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   #1199
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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   #1200
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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   #1201
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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   #1202
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Quote:
Originally Posted by pbonsalb View Post
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.
Mobil 1 is factory fill on my 6000rpm turbo 5.5l AMG engine too, I use the (lighter than factory, slightly) 0w40 on it. It barely uses any oil between 5,000 mile changes. Yet my S65 used more than a quart every 5k, even when I tried it down in the "low-mileage" range similar the amount of mileage the benz has on it now. They take about the same amount of oil per change, 8.5ish. And the benz has a dipstick, amazingly

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   #1203
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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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