Definitely throw some stuff in the gas tank. Don't run Arco shite or the like. Personally, when the tank is low I'd fill it about a quarter full with premium and also add 16oz of Marvel Mystery Oil into the tank as well. Drive it as normal and then on your next fill (and put the stuff in before the gas) put in the lucas fuel system treatment per their directions.
That should clean stuff up in the heads and injection and also lubricate that area of the motor as well.
If its pinging, you should be good after that!
