How to reduce gasoline dilution of the oil?

[mjo]

For trying to extend OCI in conjunction with a Frantz bypass filter I've noticed that the oil is starting to smell more like gasoline. It also is becoming slightly darker even with Mobil1 and Scott 1000's every 1-2k miles. The car in question is a Saturn '95 DOHC with MPFI. Car gets at least 34 mpg in the city, I don't have a lead foot, and gets regular scheduled maintenance of all parts including all the filters, spark plugs, etc. I use Pure1 FF oil filters & ACdelco copper spark plugs. Oil hasn't been dumped for at least 4k miles and would like to keep it that way for at least another 6k.

 

[sifan]

Replacing TP every 1-2k miles does not help? I am running M1 5W30 oil for close to 2k miles now and see the oil getting darker, too. Are we supposed to go back to the 3k oil drain practice even with a bypass filter?

Does this problem affect the engine performance in any way?

 

[deepsquat]

perhaps you have an injector leak?
My oil has over 24000 miles with bypass and the fuel dilution was below normal ..at 4000 ..well you must have a problem ...run a UOA?

 

[mjo]

Well, I don't know how much dilution has occurred- I will be sending a sample to the lab very soon. Is this a common problem to anyone attempting a longer OCI? What could be done that might solve the problem?

 

[RalphPWood]

Motor Guard cannot distinguish between fuel and oil since they are both hydro-carbons. Motor Guard and all cars depend on heat generated by the engine to evaporate fuel contamination which evaporates from chean oil at 135 F gasoline and 148 F diesel.
Heat created in the engine will discolor some oils -- especially if they are compounded with organic ingredients. Milky and cloudy oil means water in the oil. "1966 Motor Guard technical manual".
Back in the 60s we knew that Delo 100 would always stay a golden color if it was clean. Multgrade oils and some single wt oils would get dark because of the additives. You could use Frantz motor oil and it would never get dark because Frantz didn't allow any additives that turned dark.

Ralph

 

[sifan]

deepsquat - What is the color of your oil currently?

 

[deepsquat]

quote:

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Originally posted by sifan:
deepsquat - What is the color of your oil currently?

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A light carmel brown ...you can read the hash marks on the dipstick and rub between your fingers and it is just light brown ...Penzzoil Long Life .

 

[sifan]

deepsquat - It sounds like the color of my oil, too.

RalphPWood - Frantz oil? Does it really exist? Or you are just joking?

 

[mjo]

FWIW- mine's a medium dark brown already but I can still see the xxx on the dipstick...


Some guys just so happened to have started a thread about fuel dilution in the Maintenance section of BITOG newsgroup and how one may avoid it. If you missed it here's the link:
fuel dilution thread
I suppose leaky injectors, the fuel pressure regulator and blowby could be the source of the problem... Any other ideas anyone?? If so please post. Thanks everyone

 

[darkdan]

Well I have no fuel dilution after my auto-rx treatment and starting to use fuel power. I had 2.5% before the auto-rx and FP. Although that oil was run during the winter so that could have contributed to it, but I don't idle my car to warm it up.

 

[RalphPWood]

quote:

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Originally posted by sifan:

RalphPWood - Frantz oil? Does it really exist? Or you are just joking?

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Just joking. Ralph