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      10-13-2020, 01:19 AM   #12
edycol
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Drives: 2011 328i xDrive
Join Date: Sep 2020
Location: Colorado Springs

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Quote:
Originally Posted by bbnks2 View Post
wow wtf people who actually understand how oil works on this forum? I've had to explain hths to every person to ever ask about oil on here lol. Then they still didn't believe that crappy 40 weight oils can be "thinner" than a robust 30 weight oil in terms of dynamic viscosity. This is why LL-01 is so important because there won't be any LL-01 oils with such low HTHS ratings. Should all be 3.5+ I believe.
Yes, LL01 base start is ACE A3/B3 B4 and HTHS is min. 3.5cp. LL01FE is 3cp.
LL04 is also min. 3.5cp as base start is ACEA C3.
But yes, most people do not understand how oils work. Also, composition of oil is important. While HTHS is very important, composition determines resistance to oxidation. If one is running on track oil in 130-140c range, crappy oil will deteriorate fast. I was last week on track, and my N52 runs super hot as track is at 5,000ft altitude and of course, cooling efficiency is not as good as at lower altitudes. I am running M1 0W40. Guy in 328 N52 that was on the track was running M1 10W40. Now, 10W40 has HTHS 3.9cp, but it has very little PAO in it. It is mostly hydrocracked GrIII base. M1 0W40 is 60% GTL, 30% PAO and 10% Esters. That means better resistance to oxidation, and also better heat dissipation characteristics.
STill, I have to install cooler