Blackstone says 3% fuel in oil - what to do?

[JMerola]

I'm looking for help in trying to interpret my first oil anaylsis. I sent the oil to Blackstone with 10K on the truck, 3300 miles on the oil (no make-up added). No extended idling.



Blackstone reported 3% fuel in oil (with <2% quoted as "normal"), and a flashpoint of 385 degrees ("normal" cited as >415). SUS viscosity was 77. 1 (68-78 nl) and no antifreeze or water was found.



With this level of fuel contamination - should I begin a diagnostic evaluation of the fuel system (injectors/seals) OR should I chalk it up to engine break-in (ring seating) and recheck the oil in another 3-5k? The truck seems to be running fine - no obtrusive knocks, pings, etc. Fuel mileage has been in the 16-18 mpg range (split city and highway).



I don't want to neglect a potentially serious problem, however I don't want to over-react to this either.



I very much appreciate any input or thoughts. Thank you.



- Jason

 

[jwilliams3]

Jason,

You have a modified 500hp pickup truck.

There is going to be a little extra fuel in the oil from running a larger charger.

 

[nickleinonen]

at 3% i'd be really thinking about dumping the oil [at 5% i would be dumping the oil for sure]... i know at work, when we reach 3% we change oil and filters... but 3% of 300 imp gallons is a lot of fuel

 

[JMerola]

jwilliams - does that equate to "It's OK - the fuel in oil doesn't imply anything bad"?



I really love this truck (my first diesel), and despite all the mods, I don't abuse it very much (the dyno is the most abuse it's seen). I want to keep it as healthy as I can.



nick - I dumped the oil at 3300 miles, and am at 1500 miles on the newest 12 quarts - should I re-check the oil in another couple thousand miles to ensure there is no progression of this problem?







Thank you both for your responses.



- Jason

 

[jwilliams3]

Jason,

I wouldnt worry about it.