I have an 06’ Yamaha Grizzly 660, 07’ Kawasaki Brute Force 750, 19’ Polaris Ranger 900 and a 20’ Polaris Sportsman 450. I realize the Polaris front differentials require me to use their fluid and the Brute Force has to use their wet brake fluid for the rear differential, but I would like to find an oil that I can use on all 4 machines. Particularly the engines. Something off the shelf at places like Walmart. I can get the oil filters there as well. I am considering using Shell Rotella T6 5w-40. It Jaso rated so it should be ok for the Grizzly’s wet clutch, but in not sure about running it in the other 3 engines. I like that it comes in 2 1/2 gal jugs and is priced fairly well. What are your thoughts on running this in all 4 engines?