batches that you use back then one engine oil and once for the fuel, and sent trucks become out. they went from four and a half miles gallon that was run the same thing same engine. up to five miles to gallon. and smoke went away because it was all burning. so we didn t have any any atmosphere problems at all which was notot a problem at tht time anyhow. but then the engines quit burning oil.s and your box cool down so i had toto fix all of my problems thee with those two products. you pretty much developed this yourself. without any real background? none. no expertise no. you just use common sense, experience, and you kept trying. i had eventually i heard people who knew things i didn t