Old Mack tidied up

“I got the Engine Blowby Pack about a year or so ago for my 1975 Mack. It worked pretty good. The blowby stopped and the other problems got better quickly too. For an old engine, it tidied up pretty good. One thing that stuck out was how after using the oil flush concentrate the engine oil stayed clean for so long. It would always be black right after I changed the oil. After the flush it stayed clean for at least 800 miles or more. Love this stuff, it works.”

Paul J, Bennington, NE