Originally Posted by rocketbob
Fuel in oil is pretty common. As injectors age they bleed down at shutdown and some raw fuel ends up in the oil. Some cars like my Porsche 996 the fuel leaking out of the injectors when the engine is off will cause dilution of the oil on the lower part of the cylinder and results in bore scoring. Its a horizontally opposed engine.
That is fascinating. I did increase the size of the injectors over stock, due to the increase in long periods of high output ops. Probably a bit bigger than necessary. If the percentage of fuel goes up, and the compression stays in check, I might test new injectors.
I have almost done this anyway as with the new injectors my Air/Fuel Ratio mixture control changes the ratio quicker (with the same amount of rotation of the knob) than with smaller injectors. This is not really bad, but I like ability to have finer changes. But of course new/different injectors would require a reconfigure of the fuel map curve....(might have to dig out some old fuel maps....)
Thanks for the insight.