Rotella, Delo, Delvac 5w40's are easy enough to source and an easy choice.
All-weather viscosity grade for passenger cars and light trucks
www.redlineoil.com
100% Synthetic SAE 5W-30 for use In all air cooled 4-cycle engines. 32 Oz. bottle. SAE 5W-30 Synthetic Engine Oil 32 oz. bottle Formulated for air cooled, 4 cycle engines in outdoor power equipment For use in all air-cooled 4-cycle engines Warranty approved for Briggs & Stratton® engines...
shop.briggsandstratton.com
Shop 10W-30 Synthetic Small Engine Oil at AMSOIL. Find premium synthetic oil, filters and more online. Fast, free shipping available.
www.amsoil.com
HIGH PERFORMANCE ENGINE OIL (WITH SYNERLEC®) HPS is recommended for use in gasoline and diesel automotive, commercial fleet and stationary industrial
www.royalpurple.com
Mobil 1 Racing™ 4T 10W-40 synthetic motorcycle oil offers high-performance advantages beyond conventional motorcycle oils or similar viscosities.
www.mobil.com
Valvoline 4-Stroke Motorcycle Full Synthetic Motor Oil provides the ultimate wet clutch, transmission and engine protection for high performance 4-stroke motorcycles, cruisers and off-road bikes. Our anti-friction formulation is specifically designed for the extreme temperatures and high RPMs of...
www.valvoline.com
Four-stroke motorcycle engines work harder than four-stroke car engines. So our 4-stroke engine oil is liquid engineered to meet their extreme demands.
www.castrol.com
And, since its usually a 3/4-16 oil filter, check for clearance for a XG3614, PBL10241, or 51348xp oil filter.