So I’ve been trying to borrow a timing light forever so i can see where my 94 runner with 22re manual trans is set. And I finally gave up asking everyone I know and just bought a used older style one off ebay. I could’ve bought one and returned it but don’t feel good doing that.

Anyway the truck has been pinging with regular unleaded but goes away with premium or an added octane booster. I’m guessing whoever replaced the distributor didn’t do the timing or it came out of spec.

Anyway my question is... if the truck advances the timing automatically for higher octane fuel should I run the factory recommended regular unleaded when I’m setting the timing?