Mobil 1 ESP 0w40 in GM LS Engines

[Hohn]

KRL is a shear test where you blast the oil through a diesel fuel injector to try and damage the VII polymers. It's much harder on VII's than actual service.

I thought it was a roller bearing if I'm recalling correctly the HPL lab activities shown in a LSJr video? If it was a diesel injector, I'd like to think I'd remember that, being has how diesel fuel system are my gig.