I have been useing this brand of 2 stroke marine oil for my 2000, 200hp Johson engine since new & it is still running fine I live in Port Sulphur, Louisiana & n use my boat quite often fishing, I have a lot of hours my engine and it is still going strong! All 2 cycle oil is manufactured by the major oil companies for the engine manufacturers specs, for warranty purpose, they do not produce there on oil. I have a neighbor, who ran vey low of oil while out fishing. So I gave him the spare gallon of Pennzoil XLF, I keep onboard & got him going with no problems. His 2017 MERCURY 225, is still under factory warrannty, with no issues. The dealership said it would be fine as long as he uses a good synthetic blend oil.