Oil Additive, 1Gal, Red, Transparent

Follow the instructions and your car will be running more efficiently! Thank you Marvel! It's cheaper to buy the gallon in the long run.

I use this product as a oil & gas additive for years keeps oil from breaking down & keeps carburetor clean which is beneficial during the winter on my lawn mowers & all of my saws works well to protect from the damage that ethanol does.

My father, a master technician and engineer recommended this stuff to me many years ago. He had a dozen old toys...cars, boats, motorcycles, airplanes, etc. This is the only additive he recommended and felt that it was good for upper valve train and seats, especially on older machines. I'm using it on all my stuff. Old and new.

Helps quiet old noisy lifters amongst other things. Just a little in an old automatic transmission helped smooth out the shifts. I also put a little in my boat gas, it's a 4 stroke but I feel like it helps with condensation dissipation.

i run it in my lawn mower gas so it dont get all gummed up . run it in my truck oiltoo cant hurt.

Now that I've been using this product for a few years I can say that this does make a noticeable effort in improving performance of a vehicle. The dirtier the engine the more noticeable it's effect is. You won't notice anything running this in a clean engine save for maybe a deeper hum from the engine and exhaust. My father uses this more than I do and I've seen him use it on a motorcycle that had trouble running after a few years of storage after about 15 minutes from him adding it to the tank it began to run normal like it used to. He's added it to the oil on an old Buick that ran ok and now it runs perfectly fine after having to drain the oil and replace the filter 50 miles later from the check engine light coming on and finding the filter was filled with carbon. I typically add it to the fuel once a month or so and to the oil when it's getting near due for a change.

I purchased an older car that had a ticking - maybe a slight valve sticking problem. I put a small amount of Marvel Mystery Oil in the gas tank and also replaced half a quart of oil while changing oil. One day while on the expressway I changed lanes and all of a sudden this other car changed lanes too. In an effort to get out of the way I floored it. I looked in the rearview mirror and their was this cloud of smoke behind me. I mean huge dark cloud as I raced away. It was amazing, at first a litle scary then I realized my engine needed this. A good blowout. My motor is so quiet and idles so smooth that I hear the cars engine next to me in traffic but not mine. I actually thought on one occasion the engine had stopped but i blipped the gas and yes it was running. I will continue to use this product for the life of my car.

MMO is an old-school oil and solvent that can clean and loosen many aged and abused parts. I add it to the fuel of my cars, and feel a difference, although it could be imagined...Much better price here than in local stores, so although I generally prefer to support brick and mortar, sometimes value wins out :-)