I have a 93 f150 l6 4.9L with 305k i have hot done anything to it except basic tune up ie oil, oil filter, sparks,airfilter, fanbelt and the usual water pumps and fuel pump

i checked my compression the truck just got turned off trotlle was open i got 150psi on 1234 146 on 56 is that ok?

 

I think that is awesome for 300K.

I had 250k+ on my 83, and when I rebuilt it at 200K, the only real problem I had was oil pressure. The bearings wer egg shaped, and down to the copper. The steel crank was in good enough shape to reuse. Just a touchup at the machine shop is all it needed.

 

Those numbers are great. Did you follow up with a wet compression test?

 

how are u suposed to do a wet test all i know is that u put oil in the cylnder

 

Right after completing the dry test, you do it all over again, except add a couple ounces of motor oil to each cylinder just before you test it. Compare the wet results with the dry results, and it will tell you the condition of your rings.