fuel octane/additives

[iamseth]

I wanted to post a general question about fuel, oil and additives. I just spoke with a guy who restores these old trucks and he was telling me about ways to prolong the life of the engine:

1. He says to use mid-range octane.
2. Use a fuel additive.
3. Use an engine oil additive. (not stop-leak)

He was saying that the fuel and oil made these days are not easy on these old engines and by adding these additives, it would help keep my truck running longer. I'd like to hear what everyone thinks about this issue.

thanks!!