At my work we engineer and devopl and test 2 and 4 stroke oils and lubercantes for all the big oem brands. Cat, doo, polaris, toro, lawn boy, johnson evinrude, mercury marine, volvo marine, troy built among a ton others. Are lab is state of the art to develop these oils then run them on our 5 dynos we have. We make chain case lube, fuel stab and cleaner, coolant, gear oil and others for all the oems to. If youbuy oem oil i make it. Alot of testing and hours go into our oils for the specific engine or whatever we are making for something.