Was having multiple issues with DEF failiure alarms and cost me alot of money to have the SCR replaced with a remanufactured one. After replacement I used the combo with the super clean product first then I am using the AR 6500 between deep cleans....so far has worked well for me and will continue using.......it is a shame of what the eco-terrorists have done to diesel engines.

So far I am very pleased with this product and will continue to use thank you

Gained about 1 mpg on a recent trip. Given the cost of other diesel additives this really isn't that much more. It has A-rod's blessing so it can't be that bad.

I’ve only filled up my diesel tank three times since I started using this. My truck hasn’t regenerated once, which is a big change since it was regening about every 150 miles or so. I am happy with the results and I will keep using this product.