DURA LUBE Severe Fuel System Cleaner | 16 oz., Single

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.

The product works as advertised my vehicle is running great

My 25 year old Chevy was cranking, sputtering, and backfiring every time I went to start the car. Once I got the car running, it took a while to get power during acceleration. My mechanic said it could be either the fuel filter or the check valve on the fuel pump and that I would have to make plans to leave the car and it would be expensive to repair at $120.00 per hr labor + cost of parts. I decided to try a fuel additive instead. I ordered Dura Lube HL because it said it was twice as strong as other additives. After I added it to my tank, it only took about 5 minutes of the engine running before it came back to life. It now runs like a brand new engine. Thanks Dura Lube!

Great product used it for years but I switched to Sta bil 360

I had the engine light come on; it indicated my catalytic converter was clogged. I researched it and it suggested replacing it or to try one of the liquid cleaners. I tried a couple, but the light came on again, repeatedly. I tried DuraLube and I he light hasn’t returned.

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!!

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

I had a cylinder 3 misfire code on my 1998 Tahoe. I tried every fuel injector cleaner and nothing worked. I then came across this and tried it. It took care of my problem like a charm! I use it at every oil change now.I love this product now but unfortunately, it's hard to find because it's not carried by many auto parts stores. I hope my review convinces many to try it and help bring the demand back!