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Cd · 07-03-2009, 03:44 PM

Whuups !
I meant "blow-by ".

The spark plug has a large amount of oil on the threads when I remove it, yet the spark plug wire boot is spotless. ( Also the tubes are clean on the sides .)
I don't understand where that the oil is coming from.
Also, I don't understand how that oil could seep into the threads like that, unless it leaks downwards as remove the plug. ( The plug is screwed in very tightly.)

This sounds like the ring seal problem that you were describing.
My car is very sluggish, yet the F.E. seems normal ( around 38 MPG, with over 45 MPG on the highway on a nice long trip. This is with an automatic. )
I have been thinking that if something was wrong with the car, that the mileage would drop. I guess this is not the case.
Also, I might add that I passed my emissions test easily. If oil is getting mixed into the engine where it shouldn't be, wouldn't this cause more pollution ?

Thanks !

07-03-2009, 03:44 PM	#7 (permalink)
Cd Ultimate Fail Join Date: Feb 2008 Location: Austin,Texas Posts: 3,585 Thanks: 2,872 Thanked 1,121 Times in 679 Posts	Whuups ! I meant "blow-by ". The spark plug has a large amount of oil on the threads when I remove it, yet the spark plug wire boot is spotless. ( Also the tubes are clean on the sides .) I don't understand where that the oil is coming from. Also, I don't understand how that oil could seep into the threads like that, unless it leaks downwards as remove the plug. ( The plug is screwed in very tightly.) This sounds like the ring seal problem that you were describing. My car is very sluggish, yet the F.E. seems normal ( around 38 MPG, with over 45 MPG on the highway on a nice long trip. This is with an automatic. ) I have been thinking that if something was wrong with the car, that the mileage would drop. I guess this is not the case. Also, I might add that I passed my emissions test easily. If oil is getting mixed into the engine where it shouldn't be, wouldn't this cause more pollution ? Thanks !