Wicked500R,

Driving by the pyro as you state gives you a good idea of the fuel being burned but not an exact one. If you maintain constant rpm, then the higher the egt(this assumes a few things like no wind, constant elevation, etc) the more fuel you are burning. Changing the rpm makes a big difference. When your rpm goes up, you use more combustion events to get the same amount of power so there is less fuel per event but the amount of air stays approximately the same. Because of this, your egt will go down a little. This is the reason why lugging has such high egt's, it has a low air to fuel ratio.

I hope this answers your question. As long as you are maintaining the same gear and not drastically changing speed, driving by the pyro gives you a pretty good idea of how you are driving.

 

Thanks Dartmouth. On the highway I try to keep a steady speed and rpm...usually 65mph at 1700-1800 rpm. And try to keep the EGT at 600* A nice headwind will bring EGT to 750-800 while maintaining 65mph. A tailwind will let me run 500EGT and I'm barely touching the throttle.. I like it when that happens...

 

I think keeping your tires aired up helps some. I run 80 front, 75 rear all the time. Runnining PS-Silver to keep injectors/sensors clean also may be a plus.
If these things get dirty mileage drops. I think a BHAF or K&N also helps. 4" exhast can not hurt either.
Did I mention driving at 55-60 if you are not in a hurry?

 

I keep my tires at 65 front an 55 rear. I hate the way my truck handles on the Hwy if I air up the tires to 70 PSI with out any load in the bed and I have to drive it at 70 MPH.

 

Do you have bags? I used to hate the ride with my tires at 70psi while unloaded too. Then I tried about 12-14psi in the bags and it rides beautifully with the tires fully inflated.

65psi front, 70psi rear for me. Thinking about going to 75psi front and rear.

 

Everytime I've gotten a new vehicle I always check each climate contorl setting to see which activate the A/C compressor and which don't then I avoid the settings that activate the compressor. I always keep max air pressure in my tires, partially because there's almost always weight in the back and for MPG. I try to drive looking ahead down the road. If I see a light turn red I'll coast up to it so I don't have to slow down as far only to accelerate again. Soon I'm going to switch to synthetic gear lubes.

 

I average around 15 mpg for mix of in town driving, and get around 17 on the highway at 70 mph fuel mileage drops the faster I go so at 75 to 80 I get aroung 15 mpg.