Run a few tanks of that shell V Power.I for one think the 15/50 should bring down the wear #'s . They are not real bad but I was going to suggest the 15/50 before the cold weather or the Rotella 5/40 if you think it may improve on the wt your already using. I like Delo 15/40 better also. Another thought would be Mobil 1 0/40 with a qt of Redline. [Big Grin]