Rep Power: 0

Ok, so I changed my oil, just like the hundred times I have before. After refilling with the new oil, I let the car run for a few minutes. No lights came on and everything ran smooth. After shutting off the engine, I checked the dipstick and it was completely dry! I checked it several more times, with mixed results, sometimes dry, sometimes ok. I let the car run somemore, and checked it again. I got the same results. So, I backed the car up and drove it forward to see of anything happened, and this time the Check Engine light came on. I checked the oil one last time and the dipstick looked ok.
No oil is leaking under the car and I put in like 3.5 liters of new oil and a new filter.

Anyone know why the dipstick comes out dry?
Why did the check engine light come on? (it is still on) I think i have to reset it with the analyzer.

Could it be the oil pump?

*Note: the oil pressure light never came on...