Significant blowby reduction with FTC Decarbonizer

“I had my doubts going into buying this product but the alternative was physically going into the engine. Have a 2013 Freightliner chassis Class A RV with a Cummins ISC 8.3 in with emissions intact and only 54,000 miles. Assumed a lot of idling and sitting.

Was getting a crankcase pressure high code on long hills as well as when using the exhaust brake. Had significant puffing blowby at idle out the oil cap. Added the FTC Decarbonizer at a 1:800 ratio and within 100 miles blowby was reduced enough that the code only came on two times the entire day without a derate, which before the derate happened every time you used the exhaust brake. I still have blowby but it is reduced enough that the code is not coming on like it was. I have only ran about 20 gallons of fuel so far. I expect it to continue to get better. Of note the turbo VGT was sticking some. It seems to have gotten better.

Of note the turbo VGT was sticking some. It seems to have gotten better.

To be clear if you have blowby from bad/broken rings, etc this will not help it. It is purely a carbon oxidizer. If you’re expecting an engine to run totally different, I don’t believe you’re going to see a change in intake carbon buildup. And that may be because it requires at least 200c temps to begin oxidizing. I will follow up after I’ve run the gallon through.“

Brian H, Butner, NC