I'm glad I found this thread for my piece of mind.

Just returned from a 1000-mile surfing road trip (SF-LA-San Diego and back). On the way down the yellow oil light came on when I was on I-5 in the middle of nowhere. Luckily there was a Mobil at the nearest exit (20 miles) and I picked up 2 quarts of Mobil1 10w-30. Unfortunately they didn't have the 5w-30.

The dipstick was at the minimum level. I dumped a whole quart in there and got back to the max level.

5 days and 800 miles later I'm driving home. When I pulled into a gas station on I-5 this evening I saw the same dreaded yellow oil light flash briefly after I turned the engine off to refuel. My first thought was "WTF?!?!?! I just put in a quart on the way down!" I checked the dipstick and it was about a 1/4 inch above the minimum level. I dumped half a quart of the 2nd container of Mobil1 I picked up from the first day of the trip.

I was worried at first, then when I saw this thread and a couple of others, and looked back at my driving style this trip then it all made sense: 85-90 mph on I-5 SF-LA with 90-100F external temp , and nightmare bumper-to-bumper traffic on 405 and 5 also at around 90F, with the A/C blasting the whole time = a quart of oil.