I have a Ford F150, 2004, 5.4 supercab. The engine has the terminal problem where oil is leaking into the fuel system. My mechanic, who has given me excellent care of this vehicle recommends not putting any more money into this vehicle. What is it worth in this condition?


Asked by Dec 31, 2014 at 04:39 PM about the 2004 Ford F-150 FX4 Ext. Cab Flareside 4WD

Question type: Shopping & Pricing

From searching the internet, I have learned this truck has a similar problem to others with this engine for this model and year.  The oil is leaking into the gas and has been for over 2 years.  My mechanic, who has given me great advice dealing with this issue over the past 2 years, now says it is time to stop putting money into this vehicle.  It still starts and runs but has started using twice the fuel.  Some of you will know the technical reasons.  My question:  what is this truck worth, should I sell it to the junkyard, what can I expect to get for it?  The rest of the truck is in good to great condition.

3 Answers

Lance Dean

You should Check to see if the PCM is storing codes before making any decisions. I would also recommend a second opinion. Other then that, "does the truck run rough like it's missing at a certain RPM or speed?" Sometimes the coil packs go bad and you may "not" be getting fire to a cylinder causing gasoline to seep into the oil. How does the exhaust fumes look? No color? Smell gas? White smoke? Black smoke? When checking for codes it will let you know if a pack is bad and which one it is, "if that is the case." Another idea is to run a compression test on each cylinder. How many miles do you have on the truck? Check for Vacuum leaks. Clean the Mass Air sensor. Although, "I think a code test would be the best to start with."

Andrew Olsen

Are you sure oil is getting into fuel? Or fuel into the oil? Because it's not really possible for oil to find its way to your fuel


Just my two cents. If the vehicle is in good to great condition why junk it. My oldest is a 1996 which has been meticulously maintained from the day I purchased it, even the body and interior. Handed it down to my son in 2003 who has driven it and maintained it's appearance. The engine finally went. He spent 4G's having a manufactured engine installed. His reasoning was it was the engine cost about two G's more than the sales tax on the new truck he was looking at. Anyway, your market will be limited to those willing to purchase the truck then replace/rebuild the original engine.

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