Boost....
The GM tune gets 1-2 more MPG.
GM claims it is because of the increased torque. It gets the vehicle moving sooner and you have more off throttle time. Note when you are off the gas all the way the gas is shut off from the engine. The new DI engines operate this way.
GM claims it is because of the increased torque. It gets the vehicle moving sooner and you have more off throttle time. Note when you are off the gas all the way the gas is shut off from the engine. The new DI engines operate this way.



