There is a highway (92) that heads over the hills to the coast. When coming back from the beach, there is a steep grade. While going up this hill, with overdrive off (I'll usually be going aprx. 55 MPH) I will be at around 1 psi boost (I think) however, when I turn OD off, the R's will pick up, and the boost will drop into a low vacuum psi. So, my question is, which way eats up more gas? When the boost is up with OD on, or boost is down, with OD off?

 

Just keep it on.... and yea you will save lot's of gas! dont no what yea you have ... with 3.73's or 3.55's you still save gas with it on.....

Dave

 

Thanks Dave. So OD off = more gas?

 

OD off=more RPM=more gas