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Old 10-03-2007, 11:59 AM   #1
islichlorgan
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2005 sti
crystal grey

Question got some fuel in my oil

hello guys

i got a build 2.5 sti engine , and my oil smell a lot like gas and my motor take oil like a 2 stroke engine , the engine as about 5000 km on it and it runs like a charm, could it be that its running so rich that gas gets into the oil and then , oil get so liquid that it burn thru the cylinders?????

thanks for your help
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Old 10-03-2007, 12:26 PM   #2
bluesubie
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Yeah, probably. Our cars run rich stock. Try a used oil analysis. The fuel is really killing your oil.
Blackstone Labs , although their fuel report is less accurate than Dyson .

And an oil that Terry Dyson recently had an oil company "brew" just for fuel dilution in an Audi RS4 is Renewable Lubricants Bio-Synthetic Super High Performance SAE 5W40 HD .

Lots of info and debate about it on bobistheoilguy.com.
Whatever oil you use, make sure that it can withstand fuel dilution without completely thinning out and that you change it regularly.

Lube Control LC20 is also good for fuel dilution.

-Dennis

Last edited by bluesubie; 10-03-2007 at 12:44 PM.
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Old 10-03-2007, 01:44 PM   #3
islichlorgan
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thanks , maybe just the fact of getting a new tune could help that too.
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Old 10-03-2007, 02:25 PM   #4
dmross
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Check your PCV system too.
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Old 10-03-2007, 04:03 PM   #5
islichlorgan
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could you explain me ,how could the pcv system affect that much the fact that the oil smells gaz
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Old 10-03-2007, 04:07 PM   #6
blowbyu24
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thats why on a new motor during break in you should change your oil every 400 or 500 miles, b/c running rich will lead to fuel and oil mixture...not a big problem and make sure to change your oil right before your tune too
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Old 10-03-2007, 04:39 PM   #7
islichlorgan
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the only thing that s bogging me , is when i start the car it spits out what look like oil and gas or whatever in my driveway , but that s only on start up
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Old 10-05-2007, 11:59 PM   #8
charliew
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Default gas in oil

I'm surprised your not telling us you blew the muffler off your car if it's burning that much gassy oil. Your motor won't live long on diluted oil.
Charlie
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Old 10-06-2007, 01:33 AM   #9
flycaster
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Run an oil analysis - most oil with a bunch of miles smells like it has "fuel" in it when most times it really doesn't - repeatedly cooked oil has far different smell than fresh oil. An analysis is the only way to be sure - it'll cost you $20. Just do it.

Quote:
Originally Posted by islichlorgan View Post
the only thing that s bogging me , is when i start the car it spits out what look like oil and gas or whatever in my driveway , but that s only on start up
Condensation and rich-idle start. Totally normal.
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Old 10-06-2007, 10:32 AM   #10
dmross
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Quote:
Originally Posted by islichlorgan View Post
could you explain me ,how could the pcv system affect that much the fact that the oil smells gaz
If the PCV system is blocked up you can get oil contamination from blowby over time, more so on a motor with forged pistons and loose tolerances that's running rich.
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