Quote:
Originally Posted by fastd
how come I don't see people recommending Royal Purple more; whenever I look at a comparison test, it always seems to come out on top. What am I missing?
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That's what I use, both the Cobra and my DD '08 Mustang. The Cobra gets 10W-40, and the Mustang gets 5W-30. After about 8,500 miles, I changed the
oil in the Mustang and did a UOA. The
oil was still in good shape, and had more miles left in it.
Zinc was 893, with the Universal Averages quoted as 822. I'll change it again at 10K miles.
I havn't done a UOA from the CObra.
I was using Mobile 1 15W-50 in my Harley. It was the old stuff, not the new stuff. At about 4K miles, I changed it and did a UOA. It was all used up. I'll use M1 one more time, because I still have some left in the basement. But I'll change it sooner than 4K miles.