I run Torco GP7 on several MX two stroke bikes I own in the past.I used to use Torco oils on my bikes I found esters and synthetics gave poor clutch feel. This might have changed over the years but I did get over 160 000 kilometers before totalling it when it was recalled for a hard facing issue on second gear at 89000 ks the dealer pulled it apart and said he'd never seen gears in such good condition so they replaced the rings as the gears where perfect it ran perfectly to 170.000 ks when a cager ran into me and totaled it but that's another storey
Was OK in wear for such machines.
On sport bike I test two times T4SR, was really good and never spot an issue even on very aggressive runs on track.