I started a thread years ago on whether an SAE 30 or 15W40 given the same additive package would do better/worse, and I'm still convinced that I'd run Delvac 1630 in everything if I could buy in smaller volumes than 205L...
re the performance on the piston squirters, the Duron SAE 30 will perform better in squirters than Delo400 (as an example)....the squirters work on pressure/density/kinematic (not HTHS) viscosity, and the Duron is thinner at every temperature down to freezing (and below).
re the performance on the piston squirters, the Duron SAE 30 will perform better in squirters than Delo400 (as an example)....the squirters work on pressure/density/kinematic (not HTHS) viscosity, and the Duron is thinner at every temperature down to freezing (and below).