I’ll use em any day of the week. I’ve done several UOA’s with great results.
If RL would do like RP and offer a 5qt jug at WallyWorld for say $40 bucks
I would buy it every oil change
Pulled my OC records to check my oil choices over the 93k plus miles
I used QS 6 times, RGT 3, RL 3, MC 3, Valvoline 3 for a rounded up average of 5200 miles an oil change
Looks like QS probably needs to be my go to oil
About to do another OC soon not sure what brand. I’d like to do another Valvoline just to compare but I’d also like to go back and do another QS run to see what happens
I’ve always changed my oil as close to 5K miles as possible and it’s always been close to full at the 5K mile mark. I’ve used a lot of QS, MC and a few runs with RL