How's about K-Mart oil treatment.
Years ago, first car, had to use something along with the 40 wt to keep the rattling down in my old Chevy before the rebuild. Found out the K-Mart treament was STP with a private label on it. Same can even.
Geno
PS, your local store brand bread is likely made by Wonder, Bimbo, Sunbeam, or some other "name brand" bakery and the bags just switched when the production line hits the order. Ask me how I know.
PPS, WTH, I'll tell you.................I used to be the guy changing the bags on the wrapping machine.