To start this, I was gifted a 1987 FJ60 from the family with 163,000 miles. Now 184,000 miles currently. The engine was repaired due to a bad head back in the year 2000 with 127,000 miles. My Father, now I was always confused about how adding 5 quarts of oil to the engine had the dip stick sitting about a centimeter above the full line. Ever since the year 2000 all oil changes have been done by replacing the filter and adding 5 quarts of oil. I discovered that the dipstick might have been the wrong one this entire time, and I ordered a Toyota OEM 2F dipstick. After inserting the new dipstick, the oil barely even touched the tip of it. I added 3 more quarts of oil, and it was at the full line. Photos included of the dipsticks next to each other and of the black stone labs oil analysis. For the past 25 years and 57,000 miles, the 2F engine has only had 5 quarts of oil in it. At 181,463 miles, I just got back from a trip to Moab. 23 degrees lean to the left and several steep inclines and declines, and no excess engine wear was noticed in the oil analysis. Even better wear characteristics when compared to Blackstone's history of others' 2F oil inspections. Toyota so overbuilt this engine that it was able to run 3 quarts low for 57,000 miles with 0 excess wear. Bravo.
From looking online, I believe that the dipstick that was misinstalled back onto the engine after the rebuild was from a similar year 4Runner.
From looking online, I believe that the dipstick that was misinstalled back onto the engine after the rebuild was from a similar year 4Runner.