the70shark

If I run Gum-Out or some equivalent through the engine, followed by an oil change with Slick50; can I use unleaded premium without any problems?

Hammerhead Fred

Should run on unleaded premium without doing either of those two things.

2mnyvets

I have a 350/300 with a 350/350 cam and have been running unleaded premium for the 30+ years i have owned it. No problems. I think you are talking about an oil flush and an oil change with additives. Not sure how this would help fuel issues. For the oil, I would use a high zinc content oil if you are running the stock flat tappet (or any flat tappet) cam. Off-the-shelf oils don't have the zinc content they once did and don't protect the cam as well as the older formulation oils. Are you having fuel issues?

Dynra Rockets

they still sell that stuff?

the70shark

lol :-)

the70shark

Really, good to know; as you might guess, I have not owned a vehicle that use to run on leaded gasoline. And have also heard you need to use a lead additive or install a 'conversion kit'. Thank you for a quick reply.

the70shark

Good to know; as you might guess, I have not owned a vehicle that use to run on leaded gasoline. And have also heard you need to use a lead additive or install a 'conversion kit'. Thank you

fishslayer143

My question is why would you put Slick 50 in it? ask any rebuilder what that crap does to the inside of your block. use a quality motor oil suitable for flat tappet cam and leave the snake oil to salesmen

the70shark

OK, thanks for the input; much appreciated.

the70shark

Thanks did not know about the "zinc content" you mentioned.