First road trip test for XK - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 5 (permalink) Old 03-06-2015, 07:54 AM Thread Starter
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First road trip test for XK

Going tonight to pick my son up from college. Driving through the night to get him. Its about 670 miles one way. Trying to figure out how mnay tanks itll take lol. Looked at manual, says about 21gal tank. But on my local driving fill ups I dont think I got above 16gals lol. Of course I has between 1/4 and E sooooo....Hoping to hit close to 17 mpg on highway lmao. Will see.
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post #2 of 5 (permalink) Old 03-08-2015, 10:05 AM Thread Starter
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Well the XK did great!!! Drove 23hours straight with no issues other then a loew tire pressure sensor once but think it was after we hit a big bump in road work. I changed the air filter and I was not happy with the dealer I got the XK from. They never changed it ...it was all black and filled with dirt and seeds. I put in K&N filter after cleaning housing. I found a difference in HP and bit better gas mileage. The sweat spot was 60-65 topped around 18 mpg but I am wondering now the dealer said they went trhough everything in XK but I know they didnt ...they rushed to get it ready.....and I told them not to. It was inspected and had new tires put on it but im thinking they never bother to check the life of the spark plugs .........so thats next on my list. I will buy MOPAR ones they arent to expensive I did toy with idea of scheduling a quick change while I picked my son up from college but they wanted 135$ lol. Not sure what normal cost are but I dont feel comfortible doing myslef. I see there are different plugs ? Intake side or some other side? I think I found the right part number for 3.7l but Iam sure it will help my gas mileage for sure. City ATM is only 12 mpg.
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post #3 of 5 (permalink) Old 03-08-2015, 08:22 PM
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I think 135 to replace the plugs is a good deal. Stock plugs are very inexpensive, maybe $2 each. its about a 1.5, 2 hour job... and they're not Mopar but Autolite, I like the Autolite Iridium 9, been running great since installed years ago. I'll replace them this summer with the same.
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post #4 of 5 (permalink) Old 03-15-2015, 09:38 AM
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Quote:
Originally Posted by FletchXK View Post
Well the XK did great!!! Drove 23hours straight with no issues other then a loew tire pressure sensor once but think it was after we hit a big bump in road work. I changed the air filter and I was not happy with the dealer I got the XK from. They never changed it ...it was all black and filled with dirt and seeds. I put in K&N filter after cleaning housing. I found a difference in HP and bit better gas mileage. The sweat spot was 60-65 topped around 18 mpg but I am wondering now the dealer said they went trhough everything in XK but I know they didnt ...they rushed to get it ready.....and I told them not to. It was inspected and had new tires put on it but im thinking they never bother to check the life of the spark plugs .........so thats next on my list. I will buy MOPAR ones they arent to expensive I did toy with idea of scheduling a quick change while I picked my son up from college but they wanted 135$ lol. Not sure what normal cost are but I dont feel comfortible doing myslef. I see there are different plugs ? Intake side or some other side? I think I found the right part number for 3.7l but Iam sure it will help my gas mileage for sure. City ATM is only 12 mpg.

never trust a used car dealer!....my wifes commander after she bought it had a hole in the muffler and a noisy front strut (need replacing) and the transfer case oil had not been done in a while. All the dealer did was put on cheap brakes and tires....
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post #5 of 5 (permalink) Old 03-15-2015, 10:01 PM
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Fletch,
If I remember correctly you have a 4.7 V8 only 8 plugs. If you can turn a wrench at all you can replace your plugs. Either do one at a time or lable the wires as you remove them. A pivotal driver 3/8 inch will help with the back plugs and you will need some extensions 8-12 inch size.
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