synthetic oil has been around for decades.research and development for jet engines for an example.amsoil pioneered the stuff for us the motoring public.mobile 1,castrol and all of the dino companys have their brand of junk out there.royal purple,amsoil and red line oils are true synthetics for us power crazed motoring public.they beat the dino boys hands down period.end of discussion!!!increase in miles per gallon.almost eliminating all friction.less friction more power.extended oil changes.in the coarse of one year and that includes filter changes every 3 or 4 thousand miles.the difference in out of pocket costs are very close.do not put it in any unbroken motor unless its built like drag strip motors.who by the way tear down and rebuild as they are staging for the next run.they to my knowlege all run it. quarter mile pro racers run synthetics.performance gains vary engine to engine but they all run faster,cooler etc. etc. and some make more than one pass before changing oil.i personally run a mildly built 455 olds in my 1981 caprice 2 dr coupe.i've owned about 12 years now ,got 100,000 miles on it ,use no oil and my motor still screams, coupled with a built turbo 400 and this heavy chevy---well--- i'll put it this way many times at stop lights they all ask the same question what do you have in that car.i smile and say it came with an olds diesel.stock low compression or trigger pull engines all benefit from it.oh and don't use it if your leaking oil or a loose engine or yada yada.it works people and its gaining popularity buy and try.you will be somewhat pleased.and i'am just a hotrodder doing my own thing i work for none of the company's mentioned