[j cAT]

motor is shot was abused . main bearing worn out . low compression .. what happens is oil pressure low then the crank shaft with all that play reduces piston travel poor power and I would also expect 500miles 1 qt of oil to be added.

these should be 40-60 psi .... 25-40 psi is saying the engine is worn but use able... 20-0 psi .. its done !