M1TDT 5w40 3319 mls 07 Mazda Speed 6

[Pablo]

You must calculate the PPM's per mile. Try it out.

 

[saaber1]

This OCI difference issue makes me think that we need a "shear calculator" of some sort on this site. Maybe if we had starting viscosities of every oil we can find then we could compare to ending viscosity to get % shear. It would be even better if it could be normalized across multiple oil change intervals. I wonder if we could do something like %shear per 1000 miles or something? Rl_RS4 probably could come up with some way to do that. Ideas/thoughts?

 

[saaber1]

Originally Posted By: Pablo
You must calculate the PPM's per mile. Try it out.


Right, that works for iron but how do we evaluate shear, TBN etc.? Probably can't really. ?

for TBN, % TBN loss/ 1000 miles maybe?

 

[SilverGGA]

Originally Posted By: Pablo
Originally Posted By: saaber1
The Rotella numbers are the best by far...


Please explain............


Do you have your flame suit on?