Necessary Additives vs. Unnecessary????

Sure hardened seats are the way to go , but I wouldn't tear it down to do them . It takes at least 40 -60,000 miles to see the effects of running with out the benifits of lead in the gas. So unless yours is a daily driver and you rack up lots of miles on it I wouldn't worry about it. Besides if you get the car addicted to octain boosters and your out away from home and dont have any, you end up doing more damage to your engine driving home with it pinging and rattleing than if you tune it up properly to run without it to begin with. It's kind of like having a "crack baby", everything is fine as long as you got a few rocks, but run out and all hell breaks loose .