Question about 2003 Jeep Grand Cherokee

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Oil change frequency.I just bought this Jeep. I looked in the manual and it says every 3000-4000 miles. The gauge on the info center says next oil change due at 7300 miles. Leading me to believe that it means oil change at every 7500 miles. The man I bought it from has only used synthetic oil and I did my first oil change on it and used synthetic as well. Do I need to stick to the 3000-4000 mile area or can I go longer? Thanks, Craig

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Synthetic oil will last as long up to 10,000 in most cases depending on the brand

Posted on Apr 05, 2010

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The 3000-4000 mile oil chnage interval is for extreme driving as described in the user manual. If you are not driving in stop and go traffic,frequent engine shut off's and restarts or dusty conditions, short trips, you can adhere to the higher mileage interchange. Your vehicle should alert you when service is due.

Posted on Apr 05, 2010

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I've always been a "hard sell" on anything. Used synthetic (amsoil 0w50) in a 7000 hp dragster engine and was completely sold!!! Most quality synthetics are just so much better in every respect. and yes...you can run a quality product for up to 10,000 miles but I do recommend that you replace the filter at the half-way point. (and top off) .
You can easily go 7,500 miles. Using a filter with the smallest micron rating ensures that the majority of suspended debris is removed.
For some interesting reading check out noac volatility tests (google it)
Only drawback to all of this is that many people forget to check things under the hood....do that as a routine even though you don't need an oil change!
good luck!

Posted on Apr 05, 2010

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