This seems to have become the automotive defacto forum so I’ll ask this question here.
I’ve used fuel and jet cleaner in my gas tank and found it to have a positive effect. At least it felt that way. May have been a placebo effect. But for a few dollars a shot now and then, it’s made me feel like the car runs better.
However, there are a series of motor oil additives designed to allegedly reduce engine friction. They range in price from $5 to $50 but make similar claims in helping reduce engine wear and improve power and fuel economy. I’m mostly interested in the reducing engine wear and power improvement. Does anybody here use this stuff and notice any benefits?