I have E3 plugs and get 450 t0 550 km to tank with 5.2 engine Ive since put cold air kit on and magnaflow exhaust with MSD and now get about 600 km to a tank

 

8mpgnotgood, did you ever get your low mileage figured out?

 

Getting 21mpg after the rebuild. Same plugs that came in it. When reassembly was going on I installed all new injector O rings. Great little vehicle.

 

94 - 4.0L 5spd
570-600 km/tank
not sure how much I'll lose when I put on the 31" tires.

 

31x10.50.you will gain run full pressure and do not forget to rotate tire every 7-10 k.may have to extend shocks.good luck...

 

01 4.7 v8 Quadra drive I get 250-300 km kinda sucks
It's reading 21.1L/100km different from my civic lol 450-500 on
40L

 

dirty air filter.missfire spark plugs,low air pressure,brakes hanging up.oil change.alignment.you should get a lot more.umless it is all stop and go driving.i have same wj i get about 16/100km.city and highway mix.

 

04 Grand Cherokee 4.7 Litre engine. Summer time Highway- 12.5L/100k, mixed 15/100, city-17/100

 

that is very good.because of hills,wind,cold wet weather.i come from bell island.i have a 04 limited with 4.7 with 102,000 km

 

I do warm it up alot everything is new tires everything
So I dunno my uncle used to get 400 km on a tank
But he lives in bc doesn't warm it up and highway driving