Didn't think I'd get such hostile responses. Anyways, if you say you don't have problems with 5k changes, I wouldn't expect any. The slightly increased wear factor might take 50k to show a significent change to really notice.
For the guy that goes 5000k-7000k between changes, man that's a ton of miles you put on your car. 5000k = 5,000,000 miles.