I am not too sure what kind of modifications you guys have all made, if any, but I NEVER get any gas mileage EVEN CLOSE to what you are getting. Truck is waxed, tires are at 40 p.s.i., did the "cold air intake" with the deck plate mod, synthetic oil, 2" lift, 4x2, 2.4 L, 5 speed, manual trans, 2003 Tacoma. I coast ALL the time pulling her out of gear, down hills, to red lights, stop signs, on the freeway down hill, etc., etc.. I average 65 on the freeway and 40 in the city on the road.
The BEST tank I have had, even taking into consideration the larger tires, divide mileage by 0.92, is 24.1 mpg. I average 18 in the winter and the numbers are tracking to 21 based on summer temperatures.
I do not wind out the engine, second toyota I have owned. In third gear by 25, typically shift at 2000 rpm.
WHAT THE HELL?
27 mpg, I am almost inclined to say BS, but I know others are seeing it. I still have not reached 300 miles for a tank of gas. My light comes on at roughly 11.5 gallons.
I am at the fu*#ing gas station every 240 miles, 11 - 12 gallons of gas please.
By the way, without the correction for the tires, if I only do my calculations with the odo, I get 16.9 - 19 mpg. I know that the odo is off based on the circumference of the tire and the speedo, by 0.92... so when I am driving 63 by speedo, it is actually 70. The tires are not big either, I can get the size if needed, but the correction accounts for tire size for sure.
What really causes my truck to waste a lot of gas are:
- cold morning starts
- lots of short trips
- hard acceleration/deceleration
- stop and go traffic
My truck is mainly used for work, carrying about 200-300 lbs of gear in back with tonneau cover. 34-35 psi in the tires. Use Arco fuel. My commute is mostly highway at 70 mph. I do my best to keep my speeds constant, especially when driving in the city. This is important. I am not sure if the valvetrain in the Tacoma does this, but in some engines with throttle by wire and valve timing, when engine is under cruise, the throttle is wide open and the amount of air is regulated completely by valve timing. This greatly reduces pumping losses and increases mpg.