Quote:
Originally Posted by roy'sz
coolant is normally near the 200's and the oil to coolant exchange isn't helping your oil that much being that it is coming in at over 200 from the crankcase. After it passes by hot coolant the exchange isn't as good as it is with air. In summary it isn't a effecient way of exchanging heat, if you had a liquid cooler that had cooler water it would most likely prove more effecient then the kit that I have.
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Can be true depends on a lot of stuff. Water/coolant is a lot more conductive then air and requires a lot lower delta T and surface area. The method Nissan is employing is perfectly viable for cooling the oil. The question is if they engineered it enough. AKA big enough heat exchangers etc. The answer seems to be no they did not