My 'Ol smokey' (2N) smokes and burns oil like crazy. Have to clean the plugs after about 3 to 4 gallows of fuel. Starts with 40 pounds oil pressure and maintain at least 35 while brush hogging. Unless it starts running low of oil. I've put every additive known to tractors. Stays the same. been like that for years.
Some day I'll go thru it. But it's running for now.
Here's the last compression test I ran on it:
#1 110 120
#2 70 90
#3 60 80
#4 110 120