Not doubting you but slick50 is a synthetic lubricant. I have used it in tired old engines improving mileage and performance. It's not gonna make a knock quit, it might make a noisy lifter quieter.
1953 Chevrolet 3600 Fried Green T'mater (Vern) In the Stovebolt Gallery Caution: Political Statement Man who runs in front of car gets tired, man who runs behind car gets exhausted.
