agreed, even with just my 25 row and the mocal thermostat, i can wind up with my oil being too cold.
you probably know that the mocal thermostat is not 100% bypass, it just has a passage that opens inside allowing a path of lower resistence for the oil. in turn, it only reduces how much is passing through the cooler rather than diverting it completely.
what i have found works for me, but is not always going to be a realistic option for everyone else... i let my car warm up before i drive it. if i just do what i did before the cooler, which was start driving it as soon as the coolant temp was a few "dots" up, then it ends up taking FOREVER for the oil to get up to operating temp. But if I let the oil temp begin to register on the stock gauge before i begin driving, then it finishs warm up rather quickly as i drive it nice. even on the coldest nights the only time i end up overcooling the oil, once the engine is heat soaked from driving a little bit, is if im cruising at like 70 on the highway in 6th gear for 15-20 straight just practically idling along... but even then i dont recall seeing it ever drop below 170 although it may have.
one of these days i want to research trying to build some sort of setup that uses a second 25 row off another thermostat. i would like to run it parallel to the primary cooler (in terms of plumbing, rather than in a series), but see if i can figure out a way to have it not open pretty much at all until something like 200-220. its been in my head, but i havent looked into what type of components may be available to accomplish this. i wouldnt want to do it if it became as complicated as having to use some sort of solenoid or motor valve and switched by a sensor or anything like that. i want it to use some sort of typical expansion thermostat.
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