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Anybody loyal to one brand? In person I claim to not be brand loyal but I'm secretly loyal to Castrol. We own a 2019 KTM exc-f 500 that I've secretly used supertech cf2 in 400 hrs. Internals near perfect with that "Wrong" oil. We did a top end rebuild last week. Vehicles,tractor get the "Best"...

Is Mono grade inherently more Oxidativly stable versus Mutli? I've been using Supertech API SG motor oil in the KTM last three years.

I know this isn't scientific but I have always been against 16wt. Oil. Dad been using it in 2017 Jeep Grand Cherokee(calls for 20wt.) Last two changes. When I check oil(once a week) it is always still at the full mark & and feels just as thick between my fingers as any 20wt. That's dad tho. I'll...

Can an oil be dual rated Ck4,SN Sn+ and not be Energy Conserving? If not is there really even a difference anymore between the two other than HTHS?

Not that I use either one but just for the sake of conversation. Which would offer better/faster cold start protection 15W or 20W50 versus a Mono-grade 30 wt. Say in an operating range between 32f and 105f. Say in an older car; Say anything before 2001.

Why don't more people support smaller operations(instead of big Corp. Like ExxonMobil)such as Amalie? Fram oil is one choice that gives your money to someone other than the usual players

Thoughts on Supertech CF2/SG oil? I almost picked up some today 9.00 for a gallon. But then I put it back convincing myself good oil can't be that cheap and went with some Motorcraft 5w-30. But if it's good oil for older cars pre-2000 or lawn mowers, I would use it.

Is the Chrysler 3.7 liter generally hard on oil? Some engines are known to run hotter or tend to shear the oil quickly.. I think this motor was back spec for 20wt.

Can anyone tell me what GTX stands for?(castrol GTX)