Sounds like a lot of blow-by. Could be piston rings in one or more cylinders. With any of that going on your pretty much asking for an overhaul. Anything can make that happen, best bet is to tear it down and make sure it's only piston rings not a bad cylinder wall etc.
9.5 quarts.15w40 conventional or 5w40 synthetic.9.5 quarts.15w40 conventional or 5w40 synthetic.
12 quarts 15w40
engine: 12 quarts 15w40engine: 12 quarts 15w40
12 quarts 15w40
12 quarts 15w40
12 quarts 15w40
12 quarts 15w40
12 quarts 15w40
12 quarts 15w40
12 quarts of 15w40 synthetic oil.
12 quarts of 15w4012 quarts of 15w40
12 quarts 15w4012 quarts 15w40