pisspodpete, motor oil & it's usage is such a subjective thingthat you will get so many different opinions on this one that you still won't know what to use. Just put the word OIL into the search box at the top of this page & read till your eyes water.87 Oldwing with 136,000 miles. Still keeps up with the big boys. What would be the best oil to use now that summer is coming. Temps will be 90f and up.