There has been some talk recently about air-cooled engines running cooler with some oils than with others. So I asked Ed Hackett for his opinion; he is the author of a motoroil FAQ that has been widely distributed over the internet. I'm forwarding this with his permission. -Sami ('75 Westf.) ---------- Forwarded message ---------- Date: Mon, 28 Oct 1996 18:20:01 -0800 (PST) >From: Ed Hackett <edh@maxey.dri.edu> To: Sami Dakhlia <dakhlia@wuecona.wustl.edu> Subject: Re: motoroil and specific heat Sorry to take so long getting back to you, but work is keeping me out of the office about three weeks a month. I ddon't have any specific information on specific heat other than the synthetics perform much better as coolants. This is due to two effects, both a better heat transfer capability and less heat produced in the first place, due to lower internal friction. I've seen the oil temp drop a bit more than 30 degrees F in a Bug by switching form GTX to Valvoline Synthetic. Any of the full syntetics should help lower the oil temp. Mobil 1 15w-50 is a good value, and easy to find. Ed Hackett edh@maxey.dri.edu The Desert Research Institute DoD #0200 WMTC BMWRA DIOC Reno, Nevada (702) 673-7380 KotLS KotLE DotD #0003 I'm not really a chemist, I'm just one of BMW K100RS, Moto Morini Camel them motorsickle sonsabitches. __=o&o>__
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