Missed the Ford 300 six on my list. Had a 77 F150 that had nearly 300,000 on it when I just quit driving it. Smoked a little but still pulled hard. All the Detroit straight sixes, Ford 240-300, GM 230-250-292, Chrysler slant six and even the AMC 258 would live nearly forever if you gave them even a little bit of maintenance. The old 3 sped autos C-4/ C-6, Turbo Hydro's and Torque Flites seemed to last forever. The newer vehicles are marvelous but I doubt I could rebuild my Focus engine in a driveway over a weekend. My skills ended with point ignition and carburetors.