Hi. Checking to see if anybody has thoughts on my 2, possibly related issues. I check my oil before starting in the morning and the dipstick shows no oil. Put the dipstick back in. Remove the oil filler cap, and presto!... There is a properly filled engine. This has been going on for about 8 mos now. Also, after a commute or run on the highway, or even some (hard) running around town, the engine is noisy. The kind of rattling you get when the engine is low on oil. Yet there IS oil in the engine and the car sounds fine before I head out. Is there somehow an air lock inside the block? Oil pump weak? My tough as nails Focus is a 2007 wagon, 240K kilometres. Any body seen / heard this before?