Air bubbles on oil dipstick - Ford Mustang Forum
 
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post #1 of 9 (permalink) Old 04-03-2014 Thread Starter
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Air bubbles on oil dipstick

I checked my oil this morning and it had air bubbles on it. What does this mean? If anything good or bad I don't know. My car is a 99 GT

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post #2 of 9 (permalink) Old 04-03-2014 Thread Starter
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The motor has 200k on it also

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post #3 of 9 (permalink) Old 04-03-2014
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I don't think a few air bubbles means anything unless the oil is milky beige colored and/or foamy which would indicate water in the oil (blown head gasket).
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post #4 of 9 (permalink) Old 04-03-2014 Thread Starter
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Yeah there's no milky color to it. Just oil and it smells like gas mixing with it too

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post #5 of 9 (permalink) Old 04-03-2014
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Only condition I'm aware which can cause foaming or frothing of the oil is gross overfilling, it's caused by the lobes of the crankshaft are dipping down into the oil. You'd have to have 7+ qts in there for that to happen though. Not that it should matter or have any bearing on this, but what brand/type of oil are you running, and how much did you put in? How long has the current oil been in there? What was your procedure on checkimg the dipstick - did you put it back in, pull it a second time and there were still bubbles?

How many bubbles are we talking? A few, or is the dipstick covered in them? If only a few, although I would also be curious I don't think it's anything to be troubled about. If it's a lot, then there might be a problem.


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/1967 Coupe
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And a few Explorers too... 2008 4.0 XLT 4x2, 1996 XLT 5.0 4x2, 2003 Sport Trac XLT 4.0 4x4
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post #6 of 9 (permalink) Old 04-03-2014
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Gas in the oil = bad.

Some possible causes of gas in the oil are:
  • a stuck open (mechanically or electrically) fuel injector
  • a cam related DTC.
  • poor piston ring oil control. IE excessive blow by

Are there any outstanding DTC codes?

Consider that the bubbles may indeed be from over filling. Further, the overfilling could be from the gas.

Note, gas in the oil likely means that the cylinder walls could be gas washed as well. This will wash the oil film away possibly leading to a short service life. Don't keep running this motor unless you want more expensive repairs in your future.

With the high mileage on this motor some consideration should be given to a compression test and a cylinder leak down test.

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post #7 of 9 (permalink) Old 04-04-2014 Thread Starter
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Well I checked it when it was hot and that's why the bubbles were there. After sitting overnight I checked it again and its fine but I'm burning OR losing oil. I did my last oil change 2 months ago. And I use motorcraft oil 5w20. But while looking at my engine I noticed wetness on the driver side head under the intake. It's not coolant, I haven't lost any coolant. Im guessing its oil. It's black and nasty under there and only on the driver side and its going down into the valley of the engine and the head itself looks clean but the block/valley below looks a mess. Possible headgasket?

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post #8 of 9 (permalink) Old 04-04-2014
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Quote:
Originally Posted by tangystang View Post
Well I checked it when it was hot and that's why the bubbles were there. After sitting overnight I checked it again and its fine but I'm burning OR losing oil. I did my last oil change 2 months ago. And I use motorcraft oil 5w20. But while looking at my engine I noticed wetness on the driver side head under the intake. It's not coolant, I haven't lost any coolant. Im guessing its oil. It's black and nasty under there and only on the driver side and its going down into the valley of the engine and the head itself looks clean but the block/valley below looks a mess. Possible headgasket?

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My engine had that same thing in the valley of the block. I would advise spraying some engine degreaser or Simple Green down in there and let is sit for about 20 minutes. Get a pressure washer and shoot the crap out of that area. Mine cleaned up well. Then, keep an eye on it. This way you will know 100% if its leaking there or not. How low is your oil anyway?

With 200k, it's most likely burning some oil...

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post #9 of 9 (permalink) Old 04-04-2014 Thread Starter
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Okay, I will try that. But this stuff is shiny like its fresh so I'm sure its something that will probably just come right back. and not real sure exactly how low, but below halfway right now. and ive been on 2 really long trips with my car since the last oil change.
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