Ricky, I am partial to NOS Octane booster, although it is more expensive ($11.00 per 12-oz can) than STP or Gunk. All are suitable for our cars but steer away from products that contain alcohol. I read they promote corrosion in the fuel system because they are hygroscopic.

So you changed wiring harness too eh? Blasted biodegradable wiring harness... I paid 41,700 for mine.