dieselenthusiast
NAXJA Forum User
- Location
- Zuni Mountains, New Mexico
I have a 2000 XJ with 174,467 miles. I just did a UOA (Used Oil Analysis) and it showed high levels of fuel in the oil. I’m guessing this is due to bad injectors? Any thoughts?
I would think blow by from weak rings would lead to fuel in the oil.
But how is it getting to the oil?
If you're facing the cost of replacing injectors, it might be worthwhile first to get some test equipment. You can test them with a pressure gauge on the fuel rail and a tester that fires them individually. Of course I'd say that, because I will take any excuse to buy gadgets, but it is rather handy to be able to test your injectors.
If you have a dribbling injector that leaks down when parked, it may not show when driving, and probably won't burn much if any oil, but you might experience a puff of smoke when starting, and a miss that goes away when it's burned off the excess.
My 91 has 230k on stock injectors, my 96 has 146k on them, and my 98 has 202k on them. No problems yet, but then again I haven't had an oil analysis done.
I'd second running some BG44K to see if it fixes the problem, if it doesn't, try a new set of injectors I guess.
True: but often you will get a hard start or long cranking time until the pump builds presser in the fuel system. If you also have this condition I would say it the inj else I would look at something else first.
The earlier sample showed NO fuel in gas. With 174K on the odameter and a bunch of miles on THAT oil. That do't sound right to me. Should be some gas in it.
Incomplete combustin can cause fuel dilution to your oil. A poor spray pattern from one or more injectors, poor tuneup hardware etc. I think you should try something that surely needs to be done anyway and it could very well fix your problem. Put a can of BG 44K in it and run through a tankfull of gas.