Going to run an OCI or two with this oil to see how it does. My summer OCI this year with PYB5w20 netted different results than the previous year. MPG was down a bit, 5-6% and the oil temps ran hotter on this batch (GTL base vs. petro base?). It ran 10-15f hotter and that has my curiousity peaked on the high zoot 0w20's. I ran PYB the last two years with one OCI of PU (hated it) but I fear they are changing things too much with all the new formulations. Can't anyone make a good product and leave it alone? Interested to see how the TGMO will perform. Going to do a UOA on the current PYB fill to see if anything looks amiss.