restore additive might help some with worn cyl and rings,I have had good luck with some preety worn engines and that seemed to help a lot...didnt foul the plugs up with deposits like other oil honeys

I agree on checking the valve seals and a comp/leak test first thing

if it busted the valve cover it might have blown the old harden seals apart also

should be able to get a looky see at them with just a R&R of the valve cover

a good on the head spring tool from KD and a 2 1/2 foot rope should put some cheap stock seals on over the fender like said

I have done more seals than rerings on used engines myself

any of the snake oil be gone honeys will slow it down some by thickining the oil up

they are a patch but ya gotta do what ya gotta do till ya can do it