3M Complete Fuel System Cleaner, 08813, 16 fl. oz.

Best fuel system cleaner around. I tried at least 80% of the others. My old Volvo 740 with the straight 6 burned oil. Taking the plug out you can easily see the top of the cylinder and how black and crusty it would get. One bottle of the 3M cleaner and the top of the cylinder was nearly all aluminum colored, very little residue left. I tired this with other cleaners and kits, nothing compared. to this. It's all I use and now that it is on Amazon, so easy to buy. Only NAPA would carry this and only in small quantities. PS, my Volvo is long gone, but I use this on my Suburban and Avalon every third oil change.

I had that troublesome 420 code. I took off the negative ground wire. Resetting the ecm. Added 1 fill 16 oz.. drove it 285 miles visiting relatives and friends. No code. My mileage was noticeably better. I was just over a 1/4 tank, added another 16 oz. Drove it 85 miles, filled up, haven't seen the code in over 2 weeks. Buy this stuff on Amazon it's much cheaper. Only Napa sells it. I'm a believer, by the Monkees. My plugs needed replacing also.

This product is really incredible. I use it about every 5K miles. I drive an E85, combustion engine (not diesel), and was shocked how much it really helped my engine. I currently have about 86K miles on the car and have recently started using it. I would recommend it for older engines.

Best value in the market. This cleaner is the same professional service fix solution. Used it on my 2002 F150 after 50K miles and used one bottle every 20K until I traded the vehicle at 200K miles. No fuel delivery issues ever except a bad fuel pump.

I'm sure this is a great product and the reason why I didn't see increased mileage is because I used it in my gas-hog of a Ford Expedition. I had to buy this in addition to the "3M Complete Fuel/Intake System Cleaner" because one bottle was not sufficient for my 28 gallon gas tank. Anyways, 2-bottles of this stuff and no results probably means my injectors were clean, which is a good sign.

For when not use car much; my mechanic recommends I pour in gas tank, on occasion. As I walk to work, that can be bad for engine not to use car much, this is supposed to help.

hey make good stuff but will you really notice a difference. i didnt track my mileage. i usually use MMO every fill up.

3M..... An Excellent Company.... Product Works As Promised.... Best I've Ever Used & I Have Good Experience With This Type Product Expect Tangible Results... Recommended.... Bruce Kupper