[Lafaso870]

I picked up a Jeep Grand Cherokee with the 6 (trying to do my thing for the planet). The hype and the sticker said I should get 30 MPG HWY and 22 City (Imp gal). Well on the HWY if I keep it under 110KM, a speed so low it can get you killed on the 407, without AC, I can get 23 mpg. In the city, I am taking it very very easy and getting 16 MPG without AC. It is disappointing to say the least. Can anyone explain this major discrepancy? I believe HWY is measured at 55 MPH or 89 KPH but how different could my “easy” city driving be.

[Falkon]

WK2 Grand Cherokee Forum - JeepForum.com

[offroading.net]

Don't forget an Imperial gallon is bigger than a US gallon, 30mpg(imp) = 24mpg (US)

[KarlG]

Besides converting IMP MPG to US MPG remember that the figures are for burning 100% gas instead of 10% ethanol blend. The ethanol blend will deliver about 3 MPG less. In NY State, the nannies and our rulers will only allow us to have the corn juice.

[jeepsterguy]

Originally Posted by KarlG

Besides converting IMP MPG to US MPG remember that the figures are for burning 100% gas instead of 10% ethanol blend. The ethanol blend will deliver about 3 MPG less. In NY State, the nannies and our rulers will only allow us to have the corn juice.

You are right about the ethanol, it also reduces the engine power.
A disaster. In my area it is more cost effective to use more expensive pure gas because I the mpg goes up.