I change it myself! 6.5qts all the time no more! I don't get it. I shows at just under the top notch of the full range on the dipstick. Any other ideas.
I thought the threads might have been lubricated for easy removal, but you said yours were clean DeepStealth! I don't know.
The elctrode area on the plug does not have oil build up. I've seen old fords and chevys' wet spark plugs and they get dirty and carbon builds up fast.
Mine are clean except for the threads which have that oil.
Another question the cylinder heads on the V8 are aluminum right?