So I was talking to one of my mechanic friends, who recently left toyota, and he informed me of something that peaked my interest. He said the computer was programmed to run the engine very rich for the first 20000 km/12500mi causing poor fuel economy and after which, like a switch, I would see a drastic increase. Has anyone experienced this or have heard anything about it to corroborate this claim? My truck has only 1500 km / 1000 mi on it and even with a light foot is nowhere near what the sticker states in regards to fuel economy.
I would appreciate to hear what anyone has to say!