I changed oil in my twin cam Harley with 20w50 Lucas oil ( engine, transmission, and primary ) added Prolube to each. My experience is the engine is running smoother and quieter ( except my 2 into 1 exhaust ), the transmission is shifting smoother without the loud “clunk”, and the primary with the clutch plates feels very smooth. I am pleased with Prolube and will start using on my other vehicles - Thanks Prolube for a Good Product 👍

Im blown away I have a 2008 Toyota fj cruiser with 251k on it did oil change 10 days ago I also have a it's noisy. Rack in pinion put some prolube in the power steering pump noise is gone you have im very impressed my 1982 Toyota pickup has 516k on it pretty noisy motor put prolube in it sounds like a new truck runs amazing 👏