The recommended 15w50 Advantec Pro is $15 US a quart. While it's got a Jaso MA2 rating, it's only semi synthetic. I can buy Amsoil full synthetic 10w40 for about half the price. 10w40 is universally rated for ambient temps to 100F
When I ride it's maybe 50 to 90 degrees. I will change the oil and filter every 3000 miles as I think 6000 miles is too much for a small engine running between 4000 and 7000 rpm in daily use plus up to redline for passing.
I know at temps under 50 degrees the tranny shifts slicker with 10w40
I also want an oil in my crankcase that reaches 212F so that the condensation is removed
When I ride it's maybe 50 to 90 degrees. I will change the oil and filter every 3000 miles as I think 6000 miles is too much for a small engine running between 4000 and 7000 rpm in daily use plus up to redline for passing.
I know at temps under 50 degrees the tranny shifts slicker with 10w40
I also want an oil in my crankcase that reaches 212F so that the condensation is removed