picked up some Silkolene comp 4 15w-50 at Iron pony today to humor this thread. Jaso ma2 synthetic esther based :shrug: $19
I'm not due for an oil change .Does used T4 oil keep? I could drain the current stuff and freeze it at 10W to use for later.
https://www.amazon.com/Silkolene-600885885-Comp-4-XP-Oil/dp/B071L5M57G different new label?