loss of power
If you're getting gasoline in the oil, then you have bad piston rings that are allowing gases into the crankcase. You can find which piston(s) have bad rings by doing a compression test; a cylinder with bad rings will have lower compression.
smoke loss of power
loss of compression, loss of power, oil is "milky"
broken rings,hole in piston,bad valves
Bad compression is usually worn out piston rings, no compression is usually bad valves - assuming it's a 4-stroke.
because somewhere you are "leaking compression" with bad piston rings, intake or exhaust valves or similar.
Low Compression usually means that the cylinder rings are worn. You should also do a leak down of each cylinder. That will pinpoint which cylinder/s are bad. Also,possible poor seating of valves or improper valve seat contact.
bad valve seals, bad piston rings bad valve seals, bad piston rings
Type your answer here... Burnt intake or exhaust valve, hole in piston, broken piston rings, bad head gasket, valve spring broken.
you either have bad piston rings or your valves are staying open. Other Possibilities: Blown head gasket; cracked cylinder head; cracked piston.
Your piston rings may be bad. Do a compression test to find out.
The engine will be losing compression, and possibly burning oil. Check each cylinder to determine the compression. The loss could also be caused by a valve problem.