Originally Posted by robm225
The shift light is there to help improve MPG that's why it has such low shift points.
Yeah, I understand that.
But on the TJ's I've driven the light comes on so early that the engine really struggles if you shift at that point and you really have to lay on the gas pedal to keep it going. The optimal situation is somewhere between waiting too long to shift at higher RPMs and shifting too early when the engine struggles and you have to give it more gas. I've always found the shift light to stray towards the latter.
In my old stock '97 2.5L I always ignored the shift light and waited longer and I always got 18-20 MPG on average. Never really heard of people doing much better than that.
I just got a 2000 2.5L 2-3 weeks ago, but have only filled it up once, so not sure how mileage has been yet.