I feel better just after a nice fresh oil change as well. I many times see my economy jump exponentially within just a few miles, many times I see fine girls in somewhat questionable clothing looking under my car checking on what filter I used, or the few blonds with what looks like PP ( that's Pennzoil platinum you pervs) in their hair.. Cars merge out of my way on the interstate when I enter from the on ramp, and no 40-50 mph drivers in the hammer lane.. Gas prices drop, stock prices go up, and red lobster is having an all you can eat shrimp special..
Now really it does make me feel somewhat better, but at the same time I read all of this mumbo on the net about how fresh oil change somehow causes more wear on the engine until so may miles.. also I do periodic checks of the filter/under the car the first few days for oil leaks.. as I did have an oil filter seal problem recently.. yet have also been doing this check oil oil leaks around filter area, etc for years.
So in the end I'm glad it's done, but still I worry