Oil Additive, 1Gal, Red, Transparent

I'm a very busy man and this is very difficult to find at a good price. Walmart has it but they're never in stock. I need the gallon size because I added as an additive for my big truck. On an older truck this is an excellent additive to keep the valve train in good shape. Noticeable difference in my truck. I'm amazed at Amazon not only had it at a good price but I Can Count On the usual great quick delivery to my home.

Great stuff good price

I wish I had one of the super cool 1950's 55 gallon metal drums of this like we once had at a shop I worked at when I was a boy. If it were full of MMO I'd most likely use it all up! I have a Valvoline metal can, and it's cool, but MMO is the best of art work and such a quality product.

I started "treating" my 94 Blazer 5.7L at 272,000 miles. I was using a quart of oil every 3,000 miles before the treatment. I used it in both the oil and fuel tank. I now have 283,000 and counting. Other than a very negligible rear main seal leak (which previously existed), I am down to almost no oil consumption over the same mileage. The engine runs noticeably smoother, no longer puffs smoke at startup and has increased power. I used this product for many years and had just forgotten about it. I am very pleased with the results I have seen and definitely recommend it. Thanks.

I have used marvel mystery oil for many years with great results. I purchased from this vendor, there was damage to bottle (most likely in shipping) and the immediately took care of the issue! Great service! Highly recommend this vendor!

Add 10 oz to full tank every couple of months... cleaners entire fuel system... cheaper and better than seafoam

Great product. Only reason I didn’t give it 5 stars is because it spills very bad when trying to pour. Bottle could easily be designed with a none spill spout.

I use this in every tank of gas! I own 10 cars, it helps keep them running great!