Before having a oil cooler I ran and paid for nissan's oil and oem filter. After I ran mobil 1 and no difference in tempature. I haven't changed the factory air filters due to the fact I will be getting cai in the near future...It will be interesting to see if just cai does a temp change. I thought that, due to the obdII system on our cars that the control of air/fuel mixture would allow for a constant type of combustion and heat source(rather it run rich or lean). Interesting thought though....
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