Freedom is not free
Join Date: Sep 2007
Location: Sioux Falls, South Dakota
Re: Do you need a TBN report to determine shearing?
is a measures of the amount of active additive left in an oil sample. The TBN
is useful for people who want to extend their oil drain intervals.
As far as shearing is concerned, what you are looking for on your UOA
is the CST Viscosity or SUS Viscosity values on the report. They you can cross reference those values on the Comparative Viscosity chart (https://powerstrokenation.com/forums/...ead.php?t=1503
) to see if it is still a 40 weight oil or if it has dropped to a 30 weight, or just post it here when you receive the results.
What type of oil and which lab did you send it to?
Yep, the 6.0 or a 7.3L with big oil sure can shear oil.
2003 F250, Wildman tunes, Faubion trns, Swamps 175/146 SS,van turbo/WW, DI Intercooler, oilguard bypass, intank & pre-pump, reg return, Firestone air bags, Bilsteins, 350 HP/692 TQ
2000 Excursion- Pwrd by: T Wildman 6 pos chip, CT Performance Suspension, Riffraff Diesel Performance, J&M Tranny, 4" MBRP, 6637 filter, intank/prepump mods