Fuel Economy I get only 11MPG after Spark plug change

[Ikkesh]

140 miles and 12 gallons later.. = mpg

Just changed Sparkplugs, PCV Valve Oil, working on FPR and Fuel filter now..

also noticed Oil on spark plug #4 someone told me valve cover gasket?

[etlsport]

check the gap on your spark plugs

[VCAMILO]

Seems normal to me. I get about 11 MPG with normal driving around town.
20 gallons = 215 miles. Sometime with higway use I get 260 per 20 gallons.

[Gussie2000]

I got about 400 miles on one single tank.

When i left my house friday morning my odo reading was 48058,when i get back to NYC from binghampton my odo were 48511 so probably getting the best mileage per gallon a VX can ever get

[Hotsauce]

Bad mileage could be O2 sensor.

It could also be tires with offroad pattern tread, or underinflation.

It could be bad alignment or dragging brakes.

John C.

[Riff Raff]

Hmmm, another factor may be your right foot needs to be weighed and recalibrated.

[VehiGAZ]

It could be bad alignment or dragging brakes.

John C.

The two times my mileage dropped down to 12-13 mpg from my usual 14-17 mpg was due to a seized brake caliper.

[Joe_Black]

140 miles and 12 gallons later.. = mpg

Just changed Sparkplugs, PCV Valve Oil, working on FPR and Fuel filter now..

also noticed Oil on spark plug #4 someone told me valve cover gasket?

Have you tried resetting the ECU?