that has the same approximate viscosity at the standard measuring temperatures. I'm running AMSOIL 10W-40 and have been for about 1.5 years now. I switched to a higher weight oil in order to increase my operating oil pressure and it worked well in my case. I only put approximately 5000 miles/year on the oil and I change the oil/filter every 12 months. Here's the links to the data sheets for both the Motul 300V Chrono 10W-40 and the AMSOIL 10W-40 just as a comparison for the numbers. Cheers.