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Gas in engine oil

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71
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27
Location
Chimayo, NM, USA
#1
Hello all!! I have done some work on the car lately. Replaced timing belt and pulleys and such. Then I replaced the valve cover and decided to install brand new stock injectors since I was in there. I changed my oil yesterday and noticed gas in the motor oil. Oil was pretty thin. Also I could smell gas from the hose that crosses over cylinder 4 into the crossover pipe. I disconnected it to pull the ignition coils out to see if I could see gas leaking from the fuel rail/injectors onto the top of the motor. It’s dry. So im trying to figure out how that would happen. I would think leaking injector, but it doesn’t make sense since they are brand new. No codes, no rough idle, maybe slight decrease in gas mileage. Only other thing I’ve noticed is timing being pulled. Not a lot. But it didn’t do that before I changed injectors. Thought maybe I made a mistake possibly with timing belt because of timing being pulled, but why the gas in the oil. I’m not a pro, just a DIY guy and try to follow the service manual as close as possible. Any ideas? Thanks guys!!!
 


Last edited:

TyphoonFiST

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Rich-fizzield
#2
This is common with DI injection engines to a certain Extent. I f you are that worried send in a oil sample to Blackstone laboratories to get an idea of how much is in there along with any other metals etc.
 


akiraproject24

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#3
I really noticed the smell of gas in the oil in both my Focus (DI non turbo) and the FiST. As opposed to my previous and current daily 07 subaru impreza and a 16 honda crz which were/are both port injected and don't have such a strong gas smell.
 


OP
C
Messages
71
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27
Location
Chimayo, NM, USA
Thread Starter #4
This is common with DI injection engines to a certain Extent. I f you are that worried send in a oil sample to Blackstone laboratories to get an idea of how much is in there along with any other metals etc.
I’m probably just being paranoid. But thanks for the tip! Probably going to do that just for the peace of mind.
 


OP
C
Messages
71
Likes
27
Location
Chimayo, NM, USA
Thread Starter #5
I really noticed the smell of gas in the oil in both my Focus (DI non turbo) and the FiST. As opposed to my previous and current daily 07 subaru impreza and a 16 honda crz which were/are both port injected and don't have such a strong gas smell.
Good to know! Glad to know that it is normal to a degree like you and typhoon said!
 


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