Marvel Mystery
Oil has been around since dirt and for certain uses, I think, it is a good product. 40 years ago my buddy added an ounce or two per tank full of regular grade gasoline in his high compression AH Sprite. Saved him the extra cost of high test gas and then MMO was only about $.50 for a pint can. I use one ounce per gallon of 105 AV gas in my Cobra and have never had detonation issues. (I have only 10 1/2 to 1 compression, but occasionally will give it a shot of NOS, just for grins) No problems with burning my spark plug electrodes, runs clean, smells great, 'way cheaper than racing fuel. I know, I know. Another whole can of worms opened up.