what kind of oil do you use?
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Amsoil all three holes here. It's the best, Goggle it and you will see for your self.
I hope and pray there will come a day when "best" isn't used so liberally and categorically in these oil threads, but I fear it is a dream.
For the OP, here's a suggestion: Select from the usual suspects (Mobil 1, Amsoil, Royal Purple, Redline, et al) based on availability and price. Synthetic oil is best for the engine. For most, the "best" using these criteria would be Mobil 1 15w50, available at Walmart for about $5/qt. I prefer it over the VT variant because of price and the fact that it contains moly as an additive, which is an important but expensive anti-friction additive that is absent in many oils, including Amsoil and M1 VT. In both MCN and AI oil tests, moly was touted as a very important additive in motor oil. As suggested in the QT article mentioned earlier, warnings about using oils containing moly in wet-clutch applications may not cause problems as has been widely rumored. In HD Big Twin engines, engine oil is separated from the clutch package and this is not a concern. Don't believe statements on some Amsoil sites that Cummins has "banned" moly in oils recommended for their diesels because of "excessive valvetrain wear." I called Cummins and was told this was not true, and no such "ban" or other warning has been issued by Cummins.
Yep, AMSOIL paid for the oils and the lab time, no doubt there. To say they bought off all the oil company lawyers and marketing heads is just insane. In this day and age of lawsuit happy people, and just one of those tests were to be faked, AMSOIL would no longer be in business.
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Fact is, many vehicles come off the line with full synthetics and more will follow in the future. If synthetics were that slippery, the engine would never warm up and no one would be complaining about the heat under the seat


