International Coal Roller
Join Date: May 2012
Re: royal purple vs motorcraft
Most opinions and the UOA's that I've seen support the conclusion that synthetics resist shear alot better and in cold climates start up is a whole lot better, but from what I can tell both syn and dino are sheared down after about 5k miles just keep the oil changed and you'll be good, I've seen the 7.3 go 400k and climbing on rotella, I've seen one last till 680k on oil from the john Deere dealer, all at 5l mile oci. The cost of syn has always pushed me away, although I might try the new delo syn that walmart has for $ 18 a gal.
02 250 CCLB, 6 spd, PHP Phoenix, ISSPROs, AFE/6637 intake, 4" DE straight exhaust, WW, coolant filter with ELC, AIH delete, ebpv delete, bellowed uppies, 4" on 35's and racelines
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