I'm open for all the advice. I know this subject went around about 3wks ago. It was a coin toss between valvoline and castrol. I did see the royal purple there. Have never used synthetics.May have to give it a try. Should we classify the 235 as high perf. because of its age or what. I never thought of it as hi perf. But don't want to loose it because of cheap oil.
Ken
