Walmart carries the Mobil1 4T 10w40 for about $9-10 which is the same price as the Castrol Power 4T at Advance Auto...so obviously they watch each others price point. I'll change at 3-4,000 or once every fall before layup.
Thanks for the tip - plus Dazco says it'll make me go faster - need all the help I can get with my puny little 1600...
"Do what you can, with what you have, where you are." - Franklin Delano Roosevelt