Thanks for all the info, Fred! i just learned a ton about my car, right off the bat
I guess that the only thing that would be checkable at this stage is to check the base timing. If I pulled the valve cover to check the alignment of the cam sprockets, would i need to replace the head gasket? I remember vaguely someone on BITOG saying something along those lines.
No, you'd only need to change the valve cover gasket itself. The cam sprockets are clearly visible once the cover is off.
I just looked over Terry's comments in my UOA, and while engine wear is very low, the oil sample (Mobil 1) took a beating because of fuel dilution. Terry highlighted issues with combustion efficiency...last summer, after the UOA, I replaced the air filter and spark plugs, to try and address this. The accord now typically spends the majority of most driving trips on the highway for at least 8-20 miles each way, with some occasional local trips.
The (factory/original) spark plugs were fairly even between themselves, in terms of coloring, but were all on the dark gray side.
What's the OCI you're using with the Mobil 1? There should have been no reason to change the plugs at such a low mileage, they will easily go 110k no problems. You do seem to have an overfueling situation or something going on. On all K series I take plugs out of they are very white, as in very lean. Did you put the Iridium plugs back into it?
Can you look at the top of your engine, on both sides of the head, do you see 1 or 2 cam sensors? Some have 1 some have 2. If you only have one, it's remotely possible that 1 cam can be out of time, there will be only subtle clues that it is, such as a slight rough idle, slightly low power, or in your case rotten fuel mileage or as you're seeing fuel in the oil due to improper cam timing. A very remote possibility is a semi restricted catalyst, which I rarely see on any Honda causing some issues.
Is checking the base timing on the right track to finding any issues with combustion efficiency? Also Fred, is there anything else you would suggest looking at? Terry mentioned checking the PCV valve in his comments - does this sound plausible?
See above on the first two questions. The PCV, you could change it, no Honda dealers seem to stock them, I see the springs break in them occasionally at around 60k.
The only other thing I'd recommend having done if base timing is correct, have a cylinder leakage test performed. This is done by placing a regulated 100 psi of air pressure into the cylinders when each are at their TDC, valves closed. There are two gauges, one showing input pressure, the other showing how much the cylinder is holding. There should be, imho, no more than 4 to 8% max leakage on an engine so new. Listening to where the air goes, will show what's not sealing if it's too high.
This was actually an experiment I was looking into, back when I first got my AutoEnginuity...I should definitely follow up on it.