Originally Posted by Ristow
Thicker oil will decrease flow. Yes, it will give good gauge, since the pressure port is right at the pumps exit, but you are doing nothing to improve actual oil delivery. You are actually making it worse in most cases.
If he is bypassing oil in the pump itself due to wear, thicker oil should increase pressure, and therefore flow, in the whole system.
If pressure at the gauge is higher it's higher throughout the system.
Sic friatur crustulum
'84 GW with Nissan SD33T, early Chev NV4500, 300, narrowed Ford reverse 44, narrowed Ford 60, SOA/reversed shackle in fornt, lowered mount/flipped shackle in rear.