1994 Mercury Marquis has gas in the oil

9445RYAN

MEMBER
1994 MERCURY MARQUIS
V8
2WD
AUTOMATIC
60,000 MILES

I have a 1994 mercury marquis 60,000 miles. I just changed the oil and it had gas in it. This car is only used to drive about 2 miles a day. Does any one know what could cause this problem. This car probably has not had its oil changed in a year, until today.

5 Replies

BLACKOP555

MECHANIC
10,371 POSTS

Most likely this is due to a faulty fuel pressure regulator or more likely then not leaky fuel injectors causing the cylinders to get gas in them and since the rings dont seal 100% the gas leaks past them and down into your crank case.

Is it raw fuel or exhaust smell?

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Sunday, June 22nd, 2008 AT 1:45 PM

9445RYAN

MEMBER
7 POSTS

It smells like raw fuel.

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Monday, June 23rd, 2008 AT 9:54 AM

BLACKOP555

MECHANIC
10,371 POSTS

Would definetely be checking for a fualty fuel pressure regulator and leaky injectors causing the gas to drip in the cylinders, and then into the oil!

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Monday, June 23rd, 2008 AT 8:11 PM

9445RYAN

MEMBER
7 POSTS

How would you go about checking a leaky fuel injector?

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Tuesday, June 24th, 2008 AT 10:00 AM

BLACKOP555

MECHANIC
10,371 POSTS

Your best bet would be hook up a fuel pressure test guage to the fuel rail and get the pressure up and then turn it off and wait, compare the amounts it drops to specs, should drop a little less then 1 psi per minute.