I've been using Shell Rotella T 15W-40 in my Yamaha XV535 for the past couple of years.
But now Advance Auto has started carrying Valvoline 4-stroke motorcycle oil and I plan on switching to it.
Yamaha recommends 10W-30 for "60F and below" and 20W-40 for "40F and above." The Valvoline cycle oil comes in 10W-40 and 20W-50. Virtually all of my riding is in 40F and above weather.
Should I go for the 10W-40 or 20W-50?
But now Advance Auto has started carrying Valvoline 4-stroke motorcycle oil and I plan on switching to it.
Yamaha recommends 10W-30 for "60F and below" and 20W-40 for "40F and above." The Valvoline cycle oil comes in 10W-40 and 20W-50. Virtually all of my riding is in 40F and above weather.
Should I go for the 10W-40 or 20W-50?