I've run Redline 5w20 and/or 5w30 in my brand new 2020 5.7 since it had approximately 350 miles on it. Oddly enough, this new vehicle had a slight tick on startup anytime I left it without starting, for more than 48 hours. So I dumped the factory oil, wrestled with the apparently TORQUED on oil filter, installed a Fram XG2 filter, and filled up with the Red Line oil. I noticed almost immediately, the engine completely stopped any ticking, whether I let it sit for 2 days or 10 days. I'm at just over 10k miles now. So, bottom line, I took the approach of putting (what many people say is) THE BEST oil I can get - into my new truck, and NOT LOOKING BACK. I change it every 3,000 miles with a new fill of Red Line and another Fram XG2 filter. Knock on wood ... Today the engine runs so smooth and quiet, you'd think it was an electric vehicle!

Some folks say I could go longer with Red Line oil than 3,000 miles. That may be true, but in the big scheme of things -- compared to the cost of the truck, the oil cost is very small (I change myself) and I'd rather play it safe. For those who REALLY think I'm throwing away good oil, I'll be happy to sell you my used oil that only has 3,000 miles on it, for 1/3 the price I paid for it, plus shipping.


Thanks.
John