Quote:
Originally Posted by kennyfrc
HTHS Castrol TWS 5.4
HTHS Redline 10W-60 6.7(25% higher)
Once you shear past film strength the last line of defense before metal to metal contact is Zinc and Phosphorus.
ZDDP Redline Z&P= >1200PPM
ZDDP TWS Z&P 800/650PPM
It really boils down to these numbers and not how you "FEEL" about a particular oil or brand. Show me another 10W-60 oil with better numbers than this and I will use it!
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I def agree on the Z&P , I was actually adding Redline additive to the TWS to get the Z&P over 1200 and it didn't help. I would not feel safe just from an oil product change in this case, it is only one part of the issue. You must address temperature and the bearings themselves as well.