Oil colour ? - Civinfo
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post #1 of 11 (permalink) Old 17th July 2019, 16:45 Thread Starter
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Oil colour ?

I bought a PELA oil extractor and use it today to remove my engine oil. Oil had been changed by main dealer in January, I thought I would do 6 monthly oil changes , not filter, leave that to dealer-- I have a 5 year service plan. So bought some Castrol edge 0-30 and above extractor, and got on with it. Clean and painless, seemed to suck out all the oil. however I don't know if the oil I extracted is a bit suspect. I have done 2100 miles since dealer oil change , I don't use the car a lot ,but mainly long journeys, and the oil that came out is black --see pic. Is this normal ? Dealer says they use a fully synthetic 5-30 or 0-30 oil.
edit
I forgot to say oil looked reasonably clean on dipstick before my oil change
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Last edited by bill ericay; 17th July 2019 at 16:48.
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post #2 of 11 (permalink) Old 17th July 2019, 17:06
 
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Quote:
Originally Posted by bill ericay View Post
I bought a PELA oil extractor and use it today to remove my engine oil. Oil had been changed by main dealer in January, I thought I would do 6 monthly oil changes , not filter, leave that to dealer-- I have a 5 year service plan. So bought some Castrol edge 0-30 and above extractor, and got on with it. Clean and painless, seemed to suck out all the oil. however I don't know if the oil I extracted is a bit suspect. I have done 2100 miles since dealer oil change , I don't use the car a lot ,but mainly long journeys, and the oil that came out is black --see pic. Is this normal ? Dealer says they use a fully synthetic 5-30 or 0-30 oil.
edit
I forgot to say oil looked reasonably clean on dipstick before my oil change
The PELA oil extractors are a good bit of kit I use one myself that oil does look a bit black for 2100 miles.
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post #3 of 11 (permalink) Old 17th July 2019, 18:02
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oil will be black after 100 miles
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post #4 of 11 (permalink) Old 17th July 2019, 21:08
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Black oil quickly after changing is normal for a derv but not for a petrol.
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post #5 of 11 (permalink) Old 17th July 2019, 21:53
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was a few years back but a friends dad took car for service
he dipped oil day after and went back saying oil hadn't been changed
after a bit of fuss garage agreed to change the oil while he watched
after a run he had to take it back if oil was discoloured like it was he had to pay again if oil was clean they would give him his money back
needless to say he paid again that was a petrol car
to make it worse the mechanic was also a friend of mine and the guys son it was a bit of a ongoing joke for years
oil in petrol engine wont go as black as diesel but it will still discolour certainly after 2000 miles
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post #6 of 11 (permalink) Old 17th July 2019, 23:01
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You could try sending a sample away to a firm like Millers for a oil diagnosis report. That would show you info about your oil and engine.
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post #7 of 11 (permalink) Old 17th July 2019, 23:22
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I just checked my oil today, its done about 2000 miles since my last oil change, and although it was only off the dip stick it wasn't anything like as black as that.


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You could try sending a sample away to a firm like Millers for a oil diagnosis report. That would show you info about your oil and engine.
That's exactly what id do.
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post #8 of 11 (permalink) Old 18th July 2019, 09:27 Thread Starter
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Thanks for the replies.
Looks like it was a good idea to change my own oil after 6 months !
I looked at it a bit more optimistically, the oil on the dipstick before change was only slightly discoloured, so either the dealer used a crap oil ,or they didn't suck all the oil and sludge out ( I made sure I got everything out that would come out ) , or the third option that I seem to remember from my own oil changes years ago that synthetic oil starts off clear as water and discolours quite quickly.
The oil that I sucked out was an amber colour in the tube of the extractor, and a similar colour on the dipstick.
I haven't done my own oil changes for 6 or 7 tears as I've had service plans, and when I did it in the past it was the proper way- drain plug and into a oil tray- so I couldn't remember the old state of the oil.
Rather than going into a panic I will try to remember to suck a small quantity of oil out in a few weeks time and see what it looks like.

I will even try to remember to update this thread
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post #9 of 11 (permalink) Old 18th July 2019, 12:38
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The oil in my car has done nearly 300 miles and is still a light brown on the ole dip stick - and not blackened.. On Derv engine, it does go black quickly, but on a petrol..

So makes me think whether there is alot of oil trapped in galleries etc in the engine and mixed with the new oil when run... There also might be "crud" on the base of the pan, again mixed with the new oil.

Back in the old days, you had to run the engine with and then add flush to get the crap out, these days, it is no longer required (so I am told)..
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post #10 of 11 (permalink) Old 23rd July 2019, 17:56
 
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NOT with a petrol engine
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post #11 of 11 (permalink) Old 23rd July 2019, 17:58
 
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Originally Posted by scaramanga View Post
oil will be black after 100 miles
NOT with a petrol engine by any means
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