Question about 2004 Jeep Grand Cherokee

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What type of oil would i use for my 2004 jeep grand cherokee?

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The manufacturer generally recommends a 10w-30 oil. That's fine except that after years of research I've found that using a 20w 40 or a full synthetic with the same or better numbers is far better.
Without a long explanation of why, I'll just say that it is far superior as far as being thermally stable and resistant to mechanical shear and contamination while it offers less friction at all moving or sliding internal parts. You can look up noac volitility tests on google for more tech info.
I use synthetics in all my vehicles including race cars and have never had an oil related breakdown ever. My street engines last well over 300 thousand miles!!!
Additives like lucas and marvel oil are good but mostly unnecessary with synthetics. You will likely get a ton of responses on this but my info is proven and valid!!!
Good luck with your Jeep!!

Posted on Sep 16, 2010

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1 Answer

Why does the oil guage to go down when I stop but go up when I go( this is a 2004 jeep grand Cherokee)


Several things cause this. Old oil, bad sending unit (more likely dirt in it), The hole the sending unit screws into can get clogged, And worn main and rod bearings

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Click in this link to download free 2004 Jeep Grand Cherokee WJ Owner's Manual.pdf (344 pages pdf file, 6.1 MB).

Hope helps (remember to rate this answer).

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1 Answer

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THERE SHOULD BE AN OWNERS MANUAL IN THE GLOVE BOX,IT RECOMENDS THE GRADE OR VISCOSITY EXAMPLE 5W30, 10W30, USED IN ASSORDANCE WITH THE TEMPERATURES, CHART FOR SUMMER AND WINTER DRIVING.

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1 Answer

Where is oil sending unit 2004 grand


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My 2004 jeep grand cherokee's drivers side brake light goes out when i press the brakes with the head lights on but it. it works normal when the head lights are not on. any suggestions


I would suggest that you take a look here (I used this to correct brake-light issues on my '01):

http://www.topix.com/forum/autos/jeep-grand-cherokee/T63DRCOTUFKMHQ207

Many Grand Cherokees have had this type of issue. The thread is lengthy, but does cover just about every type of issue known with the tail/brake lights.

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Jun 06, 2009 | 1994 Jeep Grand Cherokee

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