Really? Amsoil is horrible you say? You should probably tell them about this.
I used to use their oils, the best on the market,so I told to myself if I use Interceptor is going to be great,no way the car was going horrible.
I tried Dominator and was excellent it was going the same of the tcw3 that I use now, but too expensive and has no cleaning pack.
Now I use Mystik All In One great Tcw3, very robust oil, you can feel the difference compared to regulars tcw3, I mean the classic blue thin oils, right away.
PS. When I say robust I do not intend tick for example Lucas is very tick but not robust, that was the first additive that I used as UCL, but I moved to TCW3 much better and less expensive, Lucas products are overpriced and mediocre don't like them.