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Old 09-17-2007, 06:27 PM   #1
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Excessive Ideling and Low Oil?

So last weekend my wife and I took the jeep to church (she was driving) and were in there for ~2 hours. When we got out she realized that she left the keys in the jeep w/ the engine running and the doors were locked. Luckly I had my set with me to open it up and drive home.

Would this cause any problems? Engine temp looked fine and no idiot lights (on the dash) came on during this time.

When I got home I decided that I needed to change the oil because Im not sure if the dealership had changed it last before I bought it. She has put ~ 2,000 miles on it since then. I put in 6 quarts Mobile 1 full synthetic 10W-30. However, after the oil change I decided to pour the used oil back into the containers that I had just bought (a 5qt jug and a 1qt extra bottle) and didnt even quite fill up the 5qt jug!! So im asuming that it was short ~1.5-2 quarts of oil. The strange thing is the oil light Never came on!

Is it normal for this 4.0L motor to consume this much oil? There No leaks that I can see visualy and only has ~21,000 miles on it.

The oil pressure is between the 1/2 way and 3/4 mark (5/8th mark) now after the oil change and it was at ~the 1/2 way mark before.
-Enigma Man
2005 Jeep Wrangler Unlimited w/ 4" Lift kit
15x8" rims and Siped Pro-Comp Xtreme M/t 33x12.5x15 tires.
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Old 09-17-2007, 06:48 PM   #2
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There's about that much that sits in your filter pretty much at all times. I wouldn't worry about it unless the oil looked like it had coolant or water in it.

And DAMN you must have the quietest running jeep on the planet. Mine definitely lets me know when it's running.

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Old 09-18-2007, 07:17 AM   #3
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I do not believe the "Oil Light" is used for level detection in our Jeeps, it's for low pressure....like when you spin a bearing or lose the pump.

I would not worry about it. What would happen if you were stuck in Denver traffic for 2 hours? No difference. I would not make it a practice to let it idle for 2 hours every day unattended. 1-2 quarts low (at idle) will not affect anything, the pick-up for the pump is still immeresed in oil.

Now, if you were screaming down Route 70 at 80 mph two quarts low I might be concerned. Especially if you hear the lifters starting to chatter when they dry up.... Then you know you're low on oil and need to keep the rev's down, pull over and fill up.

It ain't no fun unless you get some of it on you.
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Old 09-18-2007, 07:32 AM   #4
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Jeeps 2.5's and 4.0's are built to idle, over rocks, trails, across streams, whats a parking lot... I've spent more time waiting my turn on an obstacle at paragon.

I did have a mystery leak for a while though that took some time to find, it was the timing cover, the lower bolts had backed out and the harmonic balancer was keeping them in. Tightened them back up and never lost that mystery quart again.
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