Which will give me more kik pressure ? Thanks

 

kik? if everything is in good shape, either oil will have the same pressure, there is a regulator, 71psi, can't go higher.

 

What j9fd3s said. Honestly what is more important is synthetic vs non. Pick your weight by the temp you drive in and pick your favorite brand. Then pick synthetic vs non if you still use your OMP. (synthetic if your OMP is removed)