Really great result

“My Cummins 5.9 had bad blowby and some heavy exhaust smoke. Annual emissions test was due, and I was sure it wouldn’t pass the way it was. It doesn’t have high mileage, but I knew it had not had enough oil changes during it’s life. I took my chances and got the Blowby Pack from you and did the oil flush first. The oil that came out looked horrible. I started using the Decarbonizer and within a week or two it had settled down, it passed emissions easily. A really good result!  Here’s something interesting, I had left the old oil in a drain bucket under cover for  few weeks before getting rid of it. When I looked at it just before I got rid of it, it looked like black pitch paint – so thick and almost sticky. That’s what came out of the engine! The dipstick still shows clean oil even now. Very pleased with the result.”

Greg M. Boston, MA