i was pokin around under the hood of my truck yesterday just looking around and noticed the oil fill cap had some old oil running down the filler neck, so i took the cap off while the truck was running to wipe the oil off and i noticed some vapor coming out of the filler neck and if i flip the cap upside down and block the filler neck hole with the cap, the cap slides off after about 3 seconds. but i believe it is from the vibration of the engine, not solely from blowby. what is a good way to gauge how much blowby is too much? the truck runs phenomenal and doesnt even hesitate on cold starts, 3 revolutions and shes fired. I havent had to plug in once and its gotten to below 30 overnight here, truck has no lack of power. am i just looking at maybe injector o-rings? the injectors were just replaced 10k ago per ford dealer writeup that i got with the truck. so im having a hard time swallowing that pill, but anything is possible i guess. any input would be appreciated, thanks!