Mobil 1 oil consumption?? - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 21 (permalink) Old 02-27-2010, 09:29 PM Thread Starter
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Mobil 1 oil consumption??

I switched over to Mobil 1 5-30 around 6-8 months ago and today I noticed when I checked my oil I was nearly a quart low! I am at about the 4200 mile mark on this oil change with a WIX filter. I have no leaks at all, nor is is blowing smoke. Everything else seems fine....runs fine...etc. Anyone have any imput? I have roughly 40K on the truck now.

'06 silver 4.7 4x4, 2" Rough Country lift, 265/70/17 Goodyear Wrangler Duratracs, 17 x 8.5 MB V-Drive wheels, AEM Brute Force CAI, Optima Red Top, Bilstein HD struts up front, and a couple really cool stickers that add somewhere between 10-13 HP
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post #2 of 21 (permalink) Old 02-27-2010, 09:57 PM
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Synthetics, because of their thin molecular structure, will find its way past valve guides and rings.
However, if this oil change has 6 to 8 months under its belt, yet only 4200 miles, thats a lot of short trips.
I would not be surprised if your consumption is the result of gasoline that has accumulated in the crankcase, due to short trips, thinning the oil and causing consumption.
Also, I know it sounds like a dumb question, but, are you absolutely certain the oil was at the full mark when the oil was changed?
Many dipsticks are less than precise, often reading overfilled or underfilled even though the correct amount of oil was put in.

One of the ways to determine fuel dilution is at the next change, verify the stick reading.
Check the level weekly (you should do this anyways).
If you see no consumption for the first 2000 miles and then see consumption over the next 1000 miles, you can assume this is fuel dilution from short trips.

BTW, a consumption rate of 1 qt in 4k miles is of no real concern anyways, so I see no need for thinking too hard.
Just telling you my own experience regarding minimal consumption.

Rob


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post #3 of 21 (permalink) Old 02-27-2010, 09:59 PM
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You need to use 5w20.
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post #4 of 21 (permalink) Old 02-27-2010, 10:06 PM Thread Starter
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Quote:
Originally Posted by robby View Post
Synthetics, because of their thin molecular structure, will find its way past valve guides and rings.
However, if this oil change has 6 to 8 months under its belt, yet only 4200 miles, thats a lot of short trips.
I would not be surprised if your consumption is the result of gasoline that has accumulated in the crankcase, due to short trips, thinning the oil and causing consumption.
Also, I know it sounds like a dumb question, but, are you absolutely certain the oil was at the full mark when the oil was changed?
Many dipsticks are less than precise, often reading overfilled or underfilled even though the correct amount of oil was put in.

One of the ways to determine fuel dilution is at the next change, verify the stick reading.
Check the level weekly (you should do this anyways).
If you see no consumption for the first 2000 miles and then see consumption over the next 1000 miles, you can assume this is fuel dilution from short trips.

BTW, a consumption rate of 1 qt in 4k miles is of no real concern anyways, so I see no need for thinking too hard.
Just telling you my own experience regarding minimal consumption.

Rob
I am fairly certain it was full because I checked it every week or so for the first few weeks after the last change. I just hadn't checked it again until recently. also, ALL my driving is very short trips, usually less than 5-10 miles per trip.
So if I watch it and keep it topped off between changes will there be any damage of any kind due to the thinning, etc.?

'06 silver 4.7 4x4, 2" Rough Country lift, 265/70/17 Goodyear Wrangler Duratracs, 17 x 8.5 MB V-Drive wheels, AEM Brute Force CAI, Optima Red Top, Bilstein HD struts up front, and a couple really cool stickers that add somewhere between 10-13 HP
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post #5 of 21 (permalink) Old 02-27-2010, 10:10 PM
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Originally Posted by RipTheSix View Post
You need to use 5w20.
The 5W20 was only required for the 2006 HEMI with MDS (all MYs with MDS require 5W20) not the 4.7, which is what he has. The requirements have changed since then.

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post #6 of 21 (permalink) Old 02-27-2010, 10:15 PM
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Danny,
Because of your short hauls, I'd recommend 6 month maximum intervals, regardless of mileage.
The oil looses its film strength as fuel thins it and can lead to increased wear over time.

I wouldn't try to keep it at the full mark all the time.....you'd go nuts adding a few ounces at a time.
The grid on the dipstick represents the operating range, so, if it needs a full quart and it isn't change time yet go ahead and add it.

I'll bet though, if you go to a 6 month interval, it'll be just short of needing a quart at change time.....save the quart for the oil change.

Rob


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post #7 of 21 (permalink) Old 02-27-2010, 10:24 PM Thread Starter
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Quote:
Originally Posted by robby View Post
Danny,
Because of your short hauls, I'd recommend 6 month maximum intervals, regardless of mileage.
The oil looses its film strength as fuel thins it and can lead to increased wear over time.

I wouldn't try to keep it at the full mark all the time.....you'd go nuts adding a few ounces at a time.
The grid on the dipstick represents the operating range, so, if it needs a full quart and it isn't change time yet go ahead and add it.

I'll bet though, if you go to a 6 month interval, it'll be just short of needing a quart at change time.....save the quart for the oil change.

Rob
Thanks. Will do.

'06 silver 4.7 4x4, 2" Rough Country lift, 265/70/17 Goodyear Wrangler Duratracs, 17 x 8.5 MB V-Drive wheels, AEM Brute Force CAI, Optima Red Top, Bilstein HD struts up front, and a couple really cool stickers that add somewhere between 10-13 HP
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post #8 of 21 (permalink) Old 04-04-2010, 05:46 PM
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I have a 2010 5.7l that I just had to put a quart in of oil. It has mobil conventional oil and 5127 miles on it. The last oil change was at 2861 miles by the dealer and was full. I drive 26 miles one way daily and check it every Sunday. It was dropping slowly then all of a sudden lost a half of a quart. I can't see any oil leaks. Could it be breaking in?
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post #9 of 21 (permalink) Old 04-04-2010, 05:53 PM
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Oh the oil change was febuary 10.
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post #10 of 21 (permalink) Old 04-04-2010, 06:16 PM
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2300 miles, not fully broken in and 1 qt uasge?
Watch for consumption after the next oil change, and use the same level check proceedure after verifying it was returned to you with oil at the full line.

My proceedure recommendation is checking level before the first start up once a week.

Rob


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