Don't know if you've seen and read this whole thread linked below, but if you haven't you should. The link jumps to a post where I summarized the dP vs flow data of the 5 filters that Ascent tested. There is no way any of them produced anything close to 2 PSI dP per L/min of flow with hot oil - if they did, you would see 100 PSI of dP at 50 L/min. And the viscosity of the test oil was actually a bit thicker than a 30 grade at 100C.
At half flow rate (25 l/min = 6.6 GPM ... what most cars would be flowing in normal driving), the low to high delta is only 50 in-H2O between all of these filters, which is only 1.8 PSI. Difference between the 3 most free flowing filters is 30 in-Hg = 1.1 PSI @ 13.2 GPM flow rate.
You switched your temps here, but yes exactly. It's easier to heat a fluid up then to cool it down to reach a target viscosity. I also don't like to get fluids to hot. Around 40C is where I don't like to go beyond if I can help it. Nice graphs and homework on this equivalency!
bobistheoilguy.com
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