4102 XTREME LUBE® Maximum Performance Engine Treatment (Pack of 2)

Does everything it says it does ! Oil smelled sour before now stays clean and smells fresh after 2000 miles . Engine much quieter the instant I poured it in while it was running . Super smooth. High rislone quality like always

I don't normally write reviews, but this stuff turned off my check engine light (oil control valve) and saved me a visit to the shop-- and likely hundreds of dollars. Will be using with every oil change now

Works great, helps keep the engine clean. Used 1/2 will new oil change, added the other 1/2 a week before the next change ( the oil that was drained was pretty dark)

Purchased for an older auto engine to help it perform better and use less oil. It appears to be working some.

good product

Lots of lift noise. Changed oil after an engine flush with liquid moly. Engine gets quieter every time I run it.

Sounds the same to me still hear noisy lifters.

I have used this stuff since the 1970s. From my experience, oil does not prevent sludge buildup - even with 3k to 5k change intervals. I think that Rislone is cheap insurance for a long lasting, internally clean engine. I am driving a pentastar now-and I DO NOT want the pentastar tick! (Rockers)