MPG just went down big

[LiquidVX]

Here's another thought. Is it taking longer for your VX to warm up- or not at all? I noticed my VX heats up fast, my guess is that like some cars- it consumes more gas to heat the engine faster.

Now if you have a thermostat that is faulty or stuck open, it will take longer for the VX to heat up and the computer will try to compensate by adding more fuel till it warms up. So maybe check the thermostat- if you rule out the tires.

[xdfarrx]

I doubt the therrmostat is faulty. They are pretty stout...

[PeteVX]

Yep, thermostat is OK, i also have a toasty heated garage at home and heated parking at work too (i know, i'm soo lucky!) so it rarely has to start from being very cold, and it really gets cold here in MN!

I might put the stock air filter back on for a week, at least thats one mod i can go backwards on to see if it had an affect.

Just on the news last night gas is going to be over $2 a gal for a while.

I really shouldnt complain, its about $6 a gal in the UK!!