Jeep Commander Real World MPG

Yessssss.... get to the top of a really big hill, place it in neutral and go for it on the way down without putting the gas on...other than that, you have been screwed by Chrysler lying to you. The best you are going to get out of the 5.7 is to get on a flat or downward slope, slowly get to 58 miles per hour keeping under 2000 RPMs getting there then set the cruise control and maintain the 58 mph. You may get to 15 mpg's this way. Two to 4 valves shut down if you maintain the 58 mph's but if you waiver off of that by breaking, slowing , or speeding up, the valves willnot shut down and you will go back to the 13.5 to 14 mpgs (and that only if you keep under 62mph). So you see, if you finese the car instead of enjoy it you may get to 15 mpgs.

Replies to this message:

steve_ (Dec 12, 2011 2:13 pm)

#118 of 124 Re: HEMI 5.7 [jaguarjefft] by steve_ HOST

Dec 12, 2011 (2:13 pm)

Replying to: jaguarjefft (Dec 12, 2011 12:12 pm)

Actually coasting in neutral uses more gas than coasting in gear. In gear, the fuel gets shut off and the wheels turn the engine, keeping it running. Out of gear, fuel has to be delivered to the engine to keep it running. Go figure.

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#119 of 124 Re: 2010 Commander Sport [inuvik] by inuvik

Dec 13, 2011 (10:16 pm)

Replying to: inuvik (Jan 08, 2011 8:38 pm)

Just a fuel mileage update. We have now have 24k on the Commander and the 3.7 is still delivering over 20 mpg on a regular basis. I'm going to change the plugs within the month and that should give us a little increase in mileage.

#121 of 124 I need help! by tish332

Jan 07, 2013 (10:23 pm)

hey everyone im new to this page, and im here kinda out of desperation, i just bought an 06 jeep commander limited with the hemi, and i have a problem. Im only getting 6.6 mpg or 35 L per 100kms , ive taken it in to the dealership, they ran a scanner and found nothing wrong, but the dealer agrees the fuel consumption is way way too high!, then to get another opinion i took it to another two dealers and ran another two obd2 scanners, again nothing wrong but they both agreed that the fuel consuption is way off, so heres my cry for help, 1. can anyone tell me what their 06 hemi fuel consumption is? 2. can anyone tell me if they have had the same issue with their commander/ hemi engine, 3. the only recommendation i was given from anyone was to get a tune up done, mainly spark plugs changed, but i cant see that affecting the fuel economy that badly, so does anyone have an idea what is going on??? no codes? no engine lights, nothing just really bad fuel economy???? PLEASE HELP

Replies to this message:

jaguarjefft (Jan 08, 2013 6:58 pm)

#122 of 124 Re: I need help! [tish332] by jaguarjefft

Jan 08, 2013 (6:58 pm)

Replying to: tish332 (Jan 07, 2013 10:23 pm)

You should expect to be raped at 11 to 13...lucky to get 13 to 15. Are you pulling anything (expect 7-10)? Something seriously wrong if you are under 10 consistently without a load. Do you have the standard manufacturer rated tires or did you upgrade to snow, mudders, or off-road tires. This will knock down 2 to 3 mpg immediately. Check the spark plugs and get a light tune up. May need to get a new set of wiring. Check the muffler if there is a leak (if the truck has any muffler sounds you may have a leak.... also check manifolds for leak... if there is any undo loud rumble, you may have a leak causing another 3 to 4 mpg's Also if it is running hot or bad oil the engine may be laboring. You may need to find a personal mechanic who will spend the time searching the internet until he can find the answer. I have one who doesn't back down until he solves the problem. I am upset I only get 13 to 14 so I stuck it in the garage and bought a Prius. With the money I saved from mpg's the Prius is free and I only use the Commander when I am pulling or needing the room. Excellent vehicle except the gas situation. Good luck
JaquarJeffT

#123 of 124 gas guzzler! by tish332

Jan 08, 2013 (8:43 pm)

thanks for the help. I am going to try replacing all the spark plugs and do a little tune up on it, although the mechanic has said everything is fine. You're right I need to find a good mechanic and its hard to find one who will spend the time without charging a ton of money. Everything on it is bone stock. We really enjoy the vehicle and bought it knowing the hemi wasn't good on gas, but didnt think it would be this bad!

Replies to this message:

devino (Mar 05, 2013 5:13 am)

#124 of 124 Re: gas guzzler! [tish332] by devino

Mar 05, 2013 (5:13 am)

Replying to: tish332 (Jan 08, 2013 8:43 pm)

you must have a drive line issue 4x4 or something related if everything else is fine.. just a place to look. have them make sure all driveline is functioning correctly

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