0-20 oil is not going to sit in the upper engine when shut off. it is hot and will drop into the oil pan quite quickly. there is no reason for oil to sit in the heads when shut off, unless you are using non synthetic oil that can foul drains when not changed properly--of course this problem could take a few years to happen
i am sorry i raced fords for thirty years, as far as checking oil 5-10 min. after shut down is BS. cold morning checks will give proper readings, giving the engine oil time to drain into the pan.
Ah, someone with old school thinking like me !!
Since we are both sitting on the front porch in our rockers yelling at kids to get off our lawns, let me tell you what I did...
When I first got my Jeep and went out in the morning to check my oil, I noticed it was low. I did the "ya GOT to be kidding me !!". Then I did what the manual said. Drove it around the block a few times to warm it up, went home, waited 5 minutes, checked again. Right on the full mark.
Defies logic and no one from Jeep or Fiat has ever given a really good reason. Forum members have offered theories and hypothesis, but no hard facts from those that designed this freaky engine.
I still plan to scribe a line on the back of the dipstick for "cold" reading; like automatic tranny's used to have. Yep, Jeep (or Fiat) could've done that for us, but that falls under the topic of "logic" and modern automakers don't follow that anymore.