fuel efficiency question

[Chopper]

averaged just a tick better than 21 this last tank---best yet. This is flat Fla., and most is done at 50 or so on rural roads, with Mobil one lubes everywhere,and K&N filters,etc. etc. . Still 21 overall ain't bad. Hitting it's groove now (20000 miles) I guess. I was getting like 13 at first. That was a little distressing, considering what I could be driving in that milage range

[Elric]

would you attribute improved fuel efficiency to Mobil 1 oil and different air filters?

[ZEUS]

I seem to get around 13 all the time - in town, and traveling down the highway with cruise control in a headwind (it's Wyoming)! It's driving me crazy and broke. I have drastically reduced the lead portions in my foot because of it, so it looks like this tank might give me 15 mpg if I'm lucky. The reason I didn't buy a Sierra Denali with 4-wheel steering is because I was worried about the fuel consumption - they get more like 18 come to find out! That is from a 6.0 V8!!! What gives? I should be getting 18 mpg from a 3.5 V6 with 40,000 miles, easy! Anybody out there have suggestions on how to improve my mileage or what problems to check for that could cause such horrible "efficiency"???

[VCAMILO]

I drive 3 miles each way and I average about 10-12 in city driving mode... 13-15 when Im on the highway. I have bigger tires and lift. I like to drive fast but have slowed down due to &#@*! cops!

[WormGod]

I drive 30 miles one way every day on rural-to-highway roadways (60 miles daily) and my results vary heavily. Take into consideration traffic, how heavy your foot is, and mods.

I span from 250-340 miles on a full tank and gas up once a week generally. IMO, I dont think the VX is the best commuter, so I am looking for as second car to hold that position. The VX will be a perfect weekend driver for me.

[MrCrowley]

The most signifigant mileage increase i noticed was running Amsoil synthetic lube in the differentials. AWD seems to get a better response from less driveline resistance. The Trooper got the same treatment, and didnt see the increase. It can run 2wd rear only unlike the VX.

[mudeater34]

We have driven from Colorado to IL and back, and to NJ, NY, MD and back. Best is 16, worst is 13. We have a gnarley rack on top that I am sure does not help. We have tried driving faster, slower, cruise, no crusie, and have not seen much change. We just broke 40K on the '00.