I was told by the guy I bought my 1988 Samurai from not to use any spark plug but the the O.E. ones, but I'm not one to listen! I purchaced 4 Bosch "Platnum+2" plugs (2 electrodes), and I've gotten an increase of 3-4 miles per gallon, and my top speed (on level ground) has increased from 75 mph to almost 85 mph! What the heck, I am going to try the "Platnum+4"'s! (4 electrodes) TAILWIND P.S. I have the stock 1.3L.