Originally Posted by CR94
Originally Posted by SonofJoe
... However it might be worth mentioning some of the very positive benefits of plopping a 'tight' Group I 20W50 in your engine...
- Greater Minimum Oil Film Thickness & higher HTHS. ...
- Low Noack Volatility ...
- Low VII polymer loading (one of the lowest for the 'typical' viscosity grades). Put this together with that low Noack, and you'll deffo see this reflected in low piston deposits on tests like the Sequence IIIF/IIIG. You won't get late onset oil control ring stickage (& out of control oil loss) with a tight Group I 20W50!
- Very good oil solvency. ...
- it can be produced on fully depreciated plants ...
And yet, despite all those advantages, you use 0W-20 yourself (as I believe you've mentioned in other threads)? That's interesting, or telling!
As a compromise in a mild climate, what do you think of 5W-20 or 10W-30 in an engine for which 0W-20 is specified? I've switched to 5W-20 myself, in hope of forestalling the infamous Toyota "ring-stickage." (I will disagree about calling it "late-onset," because it often occurs so early.)
Thanks!
I am running a Group I 20W-50 / 15W-40 HDEO Mix in both my cars right now.
Originally Posted by SonofJoe
... However it might be worth mentioning some of the very positive benefits of plopping a 'tight' Group I 20W50 in your engine...
- Greater Minimum Oil Film Thickness & higher HTHS. ...
- Low Noack Volatility ...
- Low VII polymer loading (one of the lowest for the 'typical' viscosity grades). Put this together with that low Noack, and you'll deffo see this reflected in low piston deposits on tests like the Sequence IIIF/IIIG. You won't get late onset oil control ring stickage (& out of control oil loss) with a tight Group I 20W50!
- Very good oil solvency. ...
- it can be produced on fully depreciated plants ...
And yet, despite all those advantages, you use 0W-20 yourself (as I believe you've mentioned in other threads)? That's interesting, or telling!
As a compromise in a mild climate, what do you think of 5W-20 or 10W-30 in an engine for which 0W-20 is specified? I've switched to 5W-20 myself, in hope of forestalling the infamous Toyota "ring-stickage." (I will disagree about calling it "late-onset," because it often occurs so early.)
Thanks!
I am running a Group I 20W-50 / 15W-40 HDEO Mix in both my cars right now.