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Discussion Starter · #1 ·
i had just pottered up to the shops then came home and washed the car, happened to check oil level and in the filler cap was a small amount of cream gunk, couldn't see any in the engine its self. checked the coolant and the level hasn't changed.

could this be due to cold weather and the short trip?
or something v bad!!

iv had to deal with a slipped liner in my old V8, cant deal with it again!
 

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Graham - mk2 stage 3
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This is common in cars that do short trips. It is caused by water emulsifying with the oil when it does not get hot enough to evaporate off. You only really need to worry if you find oil in the coolant water.

For every gallon of fuel you burn you get a gallon of water. That is why if you do mostly short trips you should change the oil and filter more frequently than the service intervals.
 

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QUOTE(Dabhand16 @ 17 Nov 2009, 04:22 PM) <{POST_SNAPBACK}>For every gallon of fuel you burn you get a gallon of water. That is why if you do mostly short trips you should change the oil and filter more frequently than the service intervals.
So where exactly did the 20 odd gallons of water go when I did 500 miles over the weekend? I seriously doubt those figures
 

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gallon fuel- gallon of water -nah sorry mate completely wrong .
within one short trip my oil would be like water and overflowing out of the filler cap

sorry mate sounds like im haveing a dig at you dosent it ,not my intention at all .
 

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QUOTE(coolkrio @ 17 Nov 2009, 05:45 PM) <{POST_SNAPBACK}>should i panic?
Nope, take it out for a decent run and then have a peek at the oil and it should be fine - takes time for the engine to 'burn off' the condensation which occurs in there when it's first started and the oil's warmed up but the heat hasn't soaked into the engine casings etc.
 

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Ring me on 0161 406 9797 if you are worried - but I am sure that your car is fine.

We see quite a build up under the oil filler car when we are moving the cars repeatably in and out of the workshop.
 

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Graham - mk2 stage 3
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The process of combustion resullts in the formation of many things, all sorts of gases and water or water vapour. The bulk of it passes out of your exhaust as steam (never seen the water dripping from a cold exhaust or the steam coming from a car in front of you on a cold day?)

Condensation will also form inside the engine. When the engine is fully warm it will evaporate off and the water formed by the process of combustion becomes water vapour. If the engine does not reach a decent temperature the water and water vapour will not be driven off and will combine with the oil vapour in the crankcase and inside the cam cover and other similar places. This emulsion of oil and water is the white gunge.

QUOTESo where exactly did the 20 odd gallons of water go when I did 500 miles over the weekend? I seriously doubt those figures

Out of your exhaust pipe.
 

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Interesting debate on the water thing.

To the OP, really no need to worry this is very common. Only worry if you delvelop a misfire (especially when cold) and coolant level drops.
 

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QUOTE(Dabhand16 @ 17 Nov 2009, 04:22 PM) <{POST_SNAPBACK}>This is common in cars that do short trips. It is caused by water emulsifying with the oil when it does not get hot enough to evaporate off. You only really need to worry if you find oil in the coolant water.

For every gallon of fuel you burn you get a gallon of water. That is why if you do mostly short trips you should change the oil and filter more frequently than the service intervals.

Best estimate i can find is 15% on a moleclar level! >>> http://wiki.answers.com/Q/For_every_gallon...rom_the_exhaust <<<
 

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QUOTE(fishface31a @ 17 Nov 2009, 08:08 PM) <{POST_SNAPBACK}>
Best estimate i can find is 15% on a moleclar level! >>> http://wiki.answers.com/Q/For_every_gallon...rom_the_exhaust <<<


If you take petrol as a midpoint Hydrocarbon of say C8H18 then for every molecule burned you will get 8 Molecules of Carbon Dioxide and 9 of Water, but as it doesnt burn perfectly then that is only perfect world, but roughly speaking that I work out to be around .7 of a gallon of water per gallon burned so a tad more than 15%
 

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Discussion Starter · #15 ·
didn't mean to spark some crazy scientific debate!

lol as long as my/everyone else's car is fine im happy!!
 

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QUOTE(Si @ 17 Nov 2009, 09:26 PM) <{POST_SNAPBACK}>If you take petrol as a midpoint Hydrocarbon of say C8H18 then for every molecule burned you will get 8 Molecules of Carbon Dioxide and 9 of Water, but as it doesnt burn perfectly then that is only perfect world, but roughly speaking that I work out to be around .7 of a gallon of water per gallon burned so a tad more than 15%



Maybe you should post that on Wikianswers then!
 

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today i cleaned the filler cap out then went for a 50 mile drive. upon getting home i checked the coolant, and that had not changed at all. but in the filler cap there was a very small amount of cream goo! looking into the filler hole the oil in the engine looks fine.
car ran perfectly all the way.

should panicking commence again?
 

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QUOTE(coolkrio @ 18 Nov 2009, 04:32 PM) <{POST_SNAPBACK}>today i cleaned the filler cap out then went for a 50 mile drive. upon getting home i checked the coolant, and that had not changed at all. but in the filler cap there was a very small amount of cream goo! looking into the filler hole the oil in the engine looks fine.
car ran perfectly all the way.

should panicking commence again?

Has the water level dropped? - Has it misfired on start up from cold?
 

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It's just mayo I wouldn't worry about it, a few long drives will burn it off. You should try running a high performance Pug 205 - you could fill a Helmanns jar in those!!
 
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