Here's the situation: Trucks been having sluggish power lately, a little less but not significant. I recently ran 2 tanks of 20% Bio (about a month ago), and then I ran some Howe's Meaner Cleaner in my last tank. I never noticed any sluggishness from a clogged fuel filter like expected after running the Bio fuel; so I didn't change the fuel filter. After running the Howe's my power has slowly diminished, rougher idle, etc. So, I went out today and thought I'd just change the fuel filter and be done with it, even though its only been 6k since changing it. I go to check the oil and it looks like it's way over the full mark. Ironically just after reading a recent post about the same issue.

Here's the question. What does leaking fuel look like on the stick? I recently switched to Rotella 5-40 full syn. and know its a lot thinner. The oil is solid up to the mid point of the fill/full grid on the stick, but it's gets very splotchy up the stick another 3 inches or so; well above the full mark. Every time I pull it, it does the same thing. The truck has been sitting for nearly 24 hrs. so I know it should all be in the pan.

Is an oil analysis the way to go? How else can I check for a leaky or cracked injector?

 

oil sample is great but I have heard take the dipstick out and let one drip of oil fall onto a clean paper towel and watch the drop. if it gets light around the edge that is usually fuel in the oil ??

 

Thanks. Forgot about that one. I'm headed out to try it before it gets too dark.