Weird. I just turned 7K on my 05 Tacoma and I've noticed about an 10 to 12% increase in gas mileage. I considered that there could be a trip meter malfunction or some other discrepancy but I duplicated the mileage in a controlled test (known distance and MPG.)

My truck is NOT heavily modified. I have a K&N filter and synthetic engine oil. It is lifted and big tires, but has been for some time. It is my understanding that the engine computer systems are intuitive and "learn" to output optimum engine performance and economy, can anyone confirm this?

Anyone else see this? (Not that I'm complaining.)

Mike