DURA LUBESevere Fuel System Cleaner | 16 oz., Single

I've used this product for years in all my vehicles, including my 2001 Dodge Intrepid R/T. Without hesitation, I put a bottle in a full tank of fuel after every oil change, (3K-5K) to maintain the entire fuel delivery system from the fuel pump to the injectors. Though my car has over 184K miles, the 3.5 V-6 H.O. engine runs smooth, idles quietly and accelerates hard as if she was still new...I truly believe in the effectiveness of this product, as well as the DuraLube Engine Treatment product. It also is noteworthy, to know the brand was founded in 1986 and the corporate office is still in Gahanna, Ohio....it's truly a first-class American-Made product, your vehicles best friend for longevity of its fuel system operation along with improved fuel economy and performance as the result...bravo!!

This fuel system cleaner was the most effective Ive found!Results were immediate with greater gas mileage. I was seeing very little improvement with the other cleaners. The product arrived in 2 days and was easy to use. Great product!

I had an engine light on that was related to catalytic converter. I used the additive as directed and the light went off. I continue to use this product.

I can’t rate the product till it had a chance to work. We will see if it works as expected.OK, so I used it for maybe 500 miles with no change in Cat converter performance. Still throwing error codes. I didn’t want to fool with it any longer so I replaced the Cat converter and problem solved. I did some research on this stuff compared to other products and found it rates faulty well in comparison. There are other ways to treat fuel for cleaning that are much cheaper. Home brew stuff. But you should make your own judgement. I would not expect this stuff to help much if your system is clogged up pretty bad. Mine was.

I have used a lot of fuel system cleaners, but this one was the most effective out of all of them; Results within the first tank.... I improved by 2 miles to the gallon... That's 48 more miles on a full tank, which translates to almost a full round trip between work and home. I was seeing very little improvement with the other cleaners, and this one tore through the carbon issues immediately. The tank wasn't even empty yet, and I was already well over 1 mile extra per gallon. I will be using this going forward and highly recommend. I am using this in a 2011 Silverado with a 5.3L, 325, LC9.

Two bottles of this stuff and my check engine light PO420 error came back. Does not seem to have any effect on the catalytic converter

My husband and I started using this almost 30 years ago and it has always done a great job we’ve got long mileage out of our vehicles I was a pilot car driver for many years and this help me get up to 300,000 miles on my vehicle and we have always been Chevrolet/GM people and I’m just amazed it is a great product.

The product works as advertised my vehicle is running great