Back in the day I bought a 2005 ranger edge 2wd with the 3.0. Never really did anything with it but install a better flowing exhaust and a drop in k&n air filter. Been driving it for awhile but started fighting a engine misfire at around 120,000 miles. At about 165,000 miles I changed out the driver side head from a valve seat pulled in. It has 168k on it now and it is burning 2.5 quarts of oil every month. I drive a 46 mile drive one way to work every day. The truck is still in very good condition with a couple of digs here and there. IDK if I should swap in another 3.0 with updated heads, swap in a 4.0 or fight with a swap with a 5.0. I would love to buy a new truck but then again I wouldn't mind keeping my ranger. What should I do?
Here is a picture of it after I finished doing some cleaning on it today.