2003 BMW E46 M3 Rotella 15w40

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I have done lots of reading on here regarding the TWS recommended for the M3s and M5s. I just want some opinions on running Shell Rotella T4 15w40 in the S54. The car sees cold starts normally anywhere from 40-80 degree F weather. It is a day to day driver and it doesn't get pushed hard when oil temps are low, if ever. 6 speed manual. I am wanting to run a quality conventional oil in the car for a few OCIs. I have always liked this oil and I have lots of it on hand. I understand that not running 1060 in these cars is treason. I get that. Any educated opinions? Bear in mind this car has 200k miles on it, has had the rod bearings replaced and I have $4 grand in it. Thanks for the input.
 
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Many have switch or are switching to LL01 0W-40 in the S54 and beyond. I think a dual-rated 15W-40 kept to a reasonable change interval would be more than adequate.
 
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You should be fine for a reasonable interval. The 10/60 was more of a bandaid at the beginning until the figured out the rod bearing issue. The 10/60 shears down a bit as well, so the weights wont be far off.
 
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My concerns are on the 15W - I would not advise using this heavy stuff. Problem is, that on start-up the engine needs fastest possible lubrication. The sucking nozzle in the oil sump drains out with the engine shut off. A 15W oil will take too much time to be sucked up and then spread throughout the engine. Those machines die on starting not on revving - why a 0W40 works perfectly well unless use is race-like with permanent revs above the 6000-mark and temps well above 270°F permanently. In this case a 5W50 is more adequate. Markus running his S54 on 5W40 Motul 300 V series with no issues at all
 
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Originally Posted by TrueTriumph
My concerns are on the 15W - I would not advise using this heavy stuff. Problem is, that on start-up the engine needs fastest possible lubrication. The sucking nozzle in the oil sump drains out with the engine shut off. A 15W oil will take too much time to be sucked up and then spread throughout the engine. Those machines die on starting not on revving - why a 0W40 works perfectly well unless use is race-like with permanent revs above the 6000-mark and temps well above 270°F permanently. In this case a 5W50 is more adequate. Markus running his S54 on 5W40 Motul 300 V series with no issues at all
AT 40-60 degrees f he will not have issue with 15W. But I would agree that Motul would be better option, or Mobil1 5W50.
 
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Originally Posted by edyvw
AT 40-60 degrees f he will not have issue with 15W. But I would agree that Motul would be better option, or Mobil1 5W50.
Yeah more of the rampant misunderstanding of what winter ratings mean.
 
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Thanks guys. It has performed well thus far. About 300 miles in. I plan on using the Shell for 5 3k mile OCIs to help naturally clean the engine a bit. Temps and pressure seem great so far.
 
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