Pulse & Glide question

[PaleMelanesian]

Ah, a Grand Prix - nice car. That's a great highway cruiser. Just go nice and easy on the gas pedal and it'll reward you. MUCH easier than many other cars. The transmission is eager to unlock when you let up on the gas, so you'll have little need to manually shift into neutral. Just keep it rolling. Stops are a killer on those. (actually, it's the start that follows...)

A friend here has a Buick with the same drivetrain. He gets ~25 mpg in town, but has come this close to 40 on highway trips.

[MetroMPG]

Given that it's an automatic, I think your best hope is DWL in top gear with the torque converter locked. Without instrumentation, DWL is harder to do. You'd be surprised at what the slightest - almost imperceptible - changes in throttle position do to your current fuel consumption.

For DWL, a vacuum gauge would work fine.

Or wire a multimeter to your MAP sensor and aim for voltage readings that correspond to lightest load.

[Christ]

Pale - Tell me about the starting off again thing.. I try not to stop if I don't have to, b/c I can actually hear the car groaning under it's own fat backside when I hit the gas again. If we end up keeping this car, I intend to do something about THAT as well.

MetroMPG - Thanks for the tip, I'll have to see how this trip up north works out.. if it's pretty good, I'll probably invest in a Guino kit and go from there, since I can put it in a diff car later on. (PS I think I have a vacuum/boost gauge somewhere, actually.. )