1. I wanted to see if those who have paid to have their oil tested would post up.
2. Put the mileage of your car, mileage on the oil, type of oil, and type of driving you do (city/highway ratios), throw in any track or autocross also.
3. I just sent away for my kit, but I'd already just changed my oil, so I'll have to wait a year to check mine: Amsoil with app. 8-10k miles in a year.
4. But, in a few months I'll be able to check the wife's car (Corolla) where I use a generic/non-label oil made by Valvoline.

 

Here is my test from last year, that about at 70k on the car.
I think that included a trip to the dragon but cant recall. Mainly city/highway.