30 weight vs 40 weight in VW 1.8T engines

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Hey TooSlick,

What's the method for calculating HT/HS condition relative to cSt degradation? I've not seen any formulas for this, & when the question's been asked here before there was never any satisfactory answer.

Also, do you know if HT/HS & cSt change unequally (either in relative percentages or "actual" numbers), or whether or not one can be affected while the other is not?

Thanks!
 
quote:

Mobil 1 0w-40 meets VW 502 but according to some UOAs here, it's not as shear stable as 5w-30.

M1 5W-30 may well be shear stable, but it doesn't meet VW's minimum requirements for your engine.

crushedcar.gif


[ November 17, 2003, 05:53 PM: Message edited by: moribundman ]
 
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