Marketing does work.I use the 10w30 as it’s cheaper by 2-4 dollars before and after taxes. Formulation is still very great. And here in Florida once heated it thins out anyways. I wish they sold a 40 weight to public but don’t understand why not. Even if it’s GTL base stock. Shouldn’t be hard to produce or make public.
How much cleaner does the high mileage platinum clean vs regular platinum or ultra platinum is my question. I’m not too worried about seal swellers as every other change with another platinum should be fine when looking to clean up things.