Checking my oil level in a duratec

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graearea
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Checking my oil level in a duratec

I warm it up by ripping some junction exits... then back in the garage. Why does it always look like this: 


and then 

I push the dipstick, wipe, wait 30seconds and top it up with half a litre and it looks ok. 
am I destroying my poor Mondeo engine? 

Ballast-ic
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Glad I'm not the only one that can't read a dip stick. Standard advice is to take the O ring off from the top of the stick to take reading. Doesn't make a blind bit of difference. Shove it in and  wait 30 seconds - diddly squat. The only definite method is to drain it all out and fill it with the correct amount - if you can get a definite answer on what that may be  as opinions vary.

I work on the "better more than less" plan and shove a bit more in if in doubt. There must be a better way though?

graearea
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Hold on. You're saying drop it all out and then measure it all back in? Like an oil change without the change? 

UFO 7 WTF , 3d printed stuff and self cancelling indicators

ScottR400D
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Assuming it's a wet sump, have you tried measuring with the oil filler cap removed?

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graearea
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how would I do that? (it is a wet sump)

 

UFO 7 WTF , 3d printed stuff and self cancelling indicators

ScottR400D
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The reason I said it is because my wife until recently had an SLK350 which would show a dry dipstick whenever you checked it until you opened the oil  filler cap on top of the engine, when you would instantly get a reading. 

I reached the conclusion that the oil didn't flow up the dip tube until the filler cap was removed equalising the pressure in the sump and tube, and the tube was 'emptied' during running.  

It's just a thought, but it's easy to try. 

L7C
graearea
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ah. I can try that.

 

UFO 7 WTF , 3d printed stuff and self cancelling indicators

Ballast-ic
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Comment wasn't entirely seriousSmile but it does tell you how much oil you have in the engine! If it comes out clean you could bung it back in again but probably worth putting fresh oil.

ScottR400D
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#7 I'd be interested in knowing if you feel it makes a difference. It was very apparent on our SLK; nothing, whether the car had just been run, stone cold, whatever. 

I discovered it because I had reached the conclusion that the oil was off the stick and was about to put a litre in. Removed the filler cap, put in 1/4 litre, checked and it was on the maximum line on the stick. 

Left it for a week or so, checked and no show on the stick. Removed the cap, checked and there it was. I tried that several times, was definitely the case. 
 

L7C
John Vine
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Re 6:

I reached the conclusion that the oil didn't flow up the dip tube until the filler cap was removed equalising the pressure in the sump and tube, and the tube was 'emptied' during running.  

Come to think of it, my wet-sump R400D has always shown odd dipstick readings like that, so thanks for the tip!

JV 

ScottR400D
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John, I can't be certain about this, I only have a sample of 1 but I'd be very interested if you find the same effect. 

L7C