Quote:
Originally Posted by Stewey
OMC,
Do you recall the origin of this info? I seem to remember the same. In 2007, the Turbo Diesel Register performed an excellent study on both dino and syn oils (Issue 56 and 57). Unfortunately, since the study was specific to the Cummins, it's impossible to draw any conclusions about shear properties. Redline was one of the top performing oils in that test. However, at a whopping $35/gal., the thinking was that there were other good oils that were more economical.
Sorry...didn't mean to hijack.
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Seems like it was bobistheoilguy or maybe just here on the forums. I have seen a OA (but I don't remember where of Schaeffer's @ 10k, & it looked good).
The cost why I can't see using synthetic, at least in my situation. It doesn't get cold here, and I have no surging problems. At twice the cost of DELO, I'd need to get at least 15k out of it. If it shears to 30wt in 5k & you have to change it as often as dino, its not worth it. If however, you can go out to 20k & change annually, it would be a good investment. Or, if you're in an extreme cold area, the cost might be mitigated by the ease of starting.
Fleets use OA, bypass & extended OCI's for the cost savings. It can be done, just remember to use science, not old trucker's tales to tell you when to change.
OMC
