leaking past the rings
if it is lowering oil and water both and is not leaking it may have a blown head gasket and it is going out the tailpipe
1) If the oil cooler is leaking, it could be going into the oil. Check inside the oil filler neck for "cream". 2) The oil cooler cover could be leaking. If coolant leaks from there, it hits the exhaust manifold and burns off before hitting the ground. 3) Best idea: Get a bottle of commercial auto leak tracer dye. Leaks stick out like neon under a UV light.
1999 Chev 5.3L same as pf59,also current pf61
If it is leaking, then best to replace it.
1999 Toyota camery 4 cyl leaks oil when engine running
10-40W 4-5 qts. Check after adding 4
The engine oil pan is bolted to the bottom of the engine on your 1994 Mercury Tracer
Where is the Oil drain plug and oil filter on a 2006 chev trailblazer
it all depends on where it is leaking.
If the engine is overheating rapidly and/or blowing oil then it could be.
Determine where leaks originates. Cooling line? Seal?