Originally Posted By: crazyoildude
I know it does not clean as well as others but...
Just to make sure there isn't any confusion. QSUD does clean, and is good at it, it just doesn't advertise having the best cleaning abilities like some other oils might.
Overall QSUD is an excellent oil and nobody should have any hesitations to use it. Now as for your question regarding using it for 10k miles, I'd say if other oils could do it, then QSUD can do it too. However, I'd need to know more about your vehicle and its use before I'd feel confident saying any oil could go 10k miles in it.