I had a squirrely-driving '99/00 Dodge 3500 Ram Van class B early on in my RV'ing. It had about 55k miles on it when I tried a Safe-T-Plus on it. About 500 miles later, the power steering pump failed totally, with no warning, just after getting off a curvy stretch of the Blue Ridge Parkway. I can't prove a link, but I have no doubt the S-T-P caused the failure. It had made _no_ difference in the driving issues I was trying to fix.
Jim, "Don't forget to feed Schrodinger's cat before you go out."