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Old 08-13-2013, 10:47 PM   #1
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Exclamation Oil dipstick accuracy

Hi guys,
I have a question about how inaccurate the dipstick on a 2007 jeep wrangler is. I changed my oil and filter and when i filled it back up It did not take 6 quarts like it said. I put 5 and a half but now it shows a little above the safe zone before the hump after sitting all night but in the safe zone 5 minutes after turning it off. Did i overfill my engine. I don't want to kill my engine. Thanks for the help. It also started weird once but it has been starting fine and it runs at normal temp.

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Old 08-13-2013, 11:44 PM   #2
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After you initially filled it did you start the engine for 30 seconds or so to let the oil circulate through the filter and rest of the system before turning it off, waiting a few minutes for the oil to settle and then take a measurement?

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Old 08-14-2013, 12:13 AM   #3
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Yeah I did I even drove it on freeway and it ran at normal temp so I'm hoping its fine
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Old 08-14-2013, 12:44 AM   #4
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Originally Posted by bpatmon View Post
Hi guys,
I have a question about how inaccurate the dipstick on a 2007 jeep wrangler is. I changed my oil and filter and when i filled it back up It did not take 6 quarts like it said. I put 5 and a half but now it shows a little above the safe zone before the hump after sitting all night but in the safe zone 5 minutes after turning it off. Did i overfill my engine. I don't want to kill my engine. Thanks for the help. It also started weird once but it has been starting fine and it runs at normal temp.
It nevers takes 6 quarts for me. This is probably because you'll never truly drain all of the oil out. I usually put in about 5 quarts, sometimes less. It depends on what the dipstick says, of course.

I don't want to sound too OCD, but I've actually extracted oil from an engine before, through the dip stick tube, because it was overfilled. It doesn't take much overfilling to cause a leak. I really don't want to scare you. If you have some thin tubing, like from a fish tank, put it in the dip stick tube and suck some out. Yes, I'm serious. because hey, why not?
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Old 08-14-2013, 12:57 AM   #5
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My '08 usually takes about 5 and 1/2 quarts in an oil + filter change.

I wouldn't worry too much about it... As long as you're not smelling burning oil, its in there doing its job.
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Old 08-14-2013, 11:00 AM   #6
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Some oil is going to stick to the block, the galleries, the crankshaft, the connecting rods, pistons, valves, cams, etc.

Unless you power flush the engine with pressurized solvent and spin the engine remotely, you will never get six quarts of oil out of it.
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Old 08-14-2013, 11:48 AM   #7
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I assume you are checking it on level ground?
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Old 08-14-2013, 11:52 AM   #8
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Thats why I always do my oil changes in the morning/afternoon after the Jeep had all night to sit and drain into the pan. My last oil change exactly 6 quarts came out.
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Old 08-14-2013, 12:29 PM   #9
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I like to change my oil when it's warm ( or HOT ) , I feel I get a better drain that way.
I dump in 6 quarts, drive it.....

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Old 08-14-2013, 01:31 PM   #10
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I also like to change it when it's warm. Even letting it sit for a few hours the oil in the pan is still warm to borderline hot. That's when I like to change it. Warm enough that it moves quickly but not hot enough that it burns or is uncomfortable if any gets on you. I usually pop the drain plug and get up and do other stuff while its draining out. I've gotten just about 6 quarts out every oil change so a fresh 6 go back in every time. Done that on every vehicle I've owned and never had any engine or oil problems.
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Old 08-14-2013, 04:11 PM   #11
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I do warm changes only in the winter. I drive to the store to get the oil, come home, pull the plug, and go about my day. I come back hours later and finish up. On regular days (55 degrees+) I do cold changes. The oil drains just fine, it isn't grease.
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Old 08-15-2013, 02:20 AM   #12
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Thanks for all the responses guys. I feel a lot better now. I dont smell burning oil and it has been running fine. I did put techron in the tank just before the change so it could have caused the weird start. Who knows. thanks.
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Old 08-16-2013, 05:46 PM   #13
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Do you lift your jeep or drive up on ramps, if not you may not be draining all the oil!

How is the best way to remove the filter with making a mess! 2008 JK
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Old 08-16-2013, 07:00 PM   #14
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For a accurate reading, take it for a drive and warm the engine up good. In the summer 10 miles or more should do it. Make sure that you are on level ground. Turn the engine off and wait 5 minutes and then check your level. This is the best that you can do for accuracy. Just follow this guideline and you will be good to go.
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Old 08-16-2013, 07:09 PM   #15
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You will actually get more oil out if it is hot. I always do mine after trip home from town .Park it and let it cool off enough to where I can hold the drain plug without getting burnt. I pull the drain and let it drain while I change the oil and air filter which is plenty enough time for the hot oil to drain out. I buy the 5 quart jug and a single quart bottle. Add the 5 quart jug and then half of the single and run it then top off if needed.
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Old 08-16-2013, 07:51 PM   #16
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Quote:
Originally Posted by ROBDOG1 View Post
Do you lift your jeep or drive up on ramps, if not you may not be draining all the oil!

How is the best way to remove the filter with making a mess! 2008 JK
You clearly haven't lifted yet if you are asking about jacks or ramps

I slide under there while its sitting on its tires in the garage.

There really is no way to get the filter of my '08 without a mess, but I take a spray bottle of simple green to the axle when I'm done. Simple green works great on oil, you can use it to get any spatter off the garage floor too.
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Old 08-16-2013, 08:27 PM   #17
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'13. Always do warm oil changes.
Just did one today. Exactly 6 came out.. and 6 went in. The 3.6 have one of the easiest oil filters
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Old 08-25-2013, 06:58 PM   #18
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Quote:
Originally Posted by KurtVW View Post

You clearly haven't lifted yet if you are asking about jacks or ramps

I slide under there while its sitting on its tires in the garage.

There really is no way to get the filter of my '08 without a mess, but I take a spray bottle of simple green to the axle when I'm done. Simple green works great on oil, you can use it to get any spatter off the garage floor too.
You should still lift the frond end up to drain all the oil.
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Old 08-25-2013, 08:31 PM   #19
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Originally Posted by bpatmon View Post
Thanks for all the responses guys. I feel a lot better now. I dont smell burning oil and it has been running fine. I did put techron in the tank just before the change so it could have caused the weird start. Who knows. thanks.
Never put any kind of fuel additives in a modern vehicle. They do nothing, and can cause problems. If the dealer finds out you put fuel additive into the tank, they can deny any claims that have to do with the fuel system. There is absolutely no reason to ever add anything. Modern fuel systems are sealed, so there is nothing to "clean."

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