I have a mechanical guage threaded into a tee between the block and sending unit. When I start my jeep, there is a split second delay from when the engine first starts to the needle moving on the mechanical one. The dash guage always has had a delay, even if I shut it off and restart instantly, so the dash guage is not exactly speedy in transmitting information. Oil pressure delay to the mechanical guage seems a little worse when it is below freezing. I tried putting a Mobil1 filter on it and there was zero change. The whole issue is probably not ever going to be a problem, but since I have tried two different filters and they have both responed exactly the same as a PH16 Fram. I dont see the point in different filters. I have always run a conventional 10w-30.
However, Accusump is a manufacturer of oil accumulators which have more roots in racing, but I feel has excellent possibilities off road as well. I do not like hearing lifters tick on a freezing morning startup, even if it is only for half a second. A 12 volt dc solenoid valve rated for high temps and oil with a home made bottle of some sort mounted vertically would act as a decent accumulator, much the same way as water hammers function in a house. Just make sure the line feeding it is restricted in some way so the oil pump fills it back up slowly, ensuring oil to the engine first. That is my plan to build one sometime this summer before it gets cold again. If I procrastinate too long, I will probably just buy one.