Originally Posted by oil_film_movies
Originally Posted by edyvw
Originally Posted by weasley
Originally Posted by oil_film_movies
Bottom line: For any engine whose manufacturer and warrantor says to use HTHS 2.7......(The HTHS 2.7 already takes into account desert thrashing, high-altitude hot mountain driving, etc....)
Where is this 2.7 HTHS "recommendation" coming from? The VW spec says >=2.6cP and I've never seen an OEM specifically recommend an HTHS requirement.
It is based on specifications. Specifications require minimum HTHS.
True 2.6 hths is the lowest you're allowed to go with VW 508, yet most 0w-20 oils are simply HTHS 2.7 +/-0.1...Not much variation seen.... Redline 0w20 is the highest I've ever seen in a 0w-20 and it's HTHS 2.9, but its an oddball in the 0w-20 universe for that. Effectively, HTHS 2.7 is where VW knows they are targeting.
You can go up in HTHS a little of course. I'd recommend going the next step up if racing or towing or pushing it over mountains in hot weather, hard stuff. The next step up would be to use an HTHS 3.0 oil. You don't have to go any further away than what the whiz-kid engineers at VW say (HTHS 2.7 ----> HTHS 3.0 is enough here. Unless you assume VW engineers are idiots and can't do durability testing.
Same engineers who said Dino oil in 1.8T is OK, and then got slapped with multimillion dollar law suit?
Same engineers who said VW Atlas uses 0W30 oil, but we do not have 0W30 oil?
Same engineers who said that they have clean diesel and those not need SCR system, bcs. they are just that good?
You do realize that engineers do not sell cars?