From what I have seen in tests Amsoil is a bit better than all the others, but is three times the price. Kirkland brand from BJs is the cheapest and is as good as most of the others. I'm talking synthetics.
Make sure your control cable is fully retracting the valve on the valve body by manually pulling it back under the hood. I have a speedcast setup and they are pretty reliable old school vs all kinds of high tech crap they want to sell you today. I do 16 difficult driveways and three private...
On Monday i was flying up a gravel driveway and hit a new rock that frost pushed up recently. Plow flew upwards to maximum extension instead of just tripping. **** like that happens to geveryone when you're doing commercial amounts of plowing. Look at plowing miles as ten times harder on frame...
Good tread and extra weight. I had to set up a plow truck out of an open diff blazer k1500 for icy steep driveways. I don't have slip. My next step will be a locker but this is the quickest and cheapest thing to do.