In Reply to: Re: Synthetic oils and heat transfer...?, Andrew [Profile/Gallery] , Tue, 26 Jun 2001 23:05:08

I don't know where you've seen evidence of a "wide-spread belief," but
I've heard nothing that would suggest that synthetics aren't just as advantageous for air-cooled engines as for others. In fact, I'd wager there is even more rationale for its use since air-cooled engines have poorer control of cooling. With no thermostatic control to accelerate warming, the inherent flow characteristics when cold are an asset. When hot with insufficient air flowing over cooling fins, the ability of synthetic to handle high heat is also an advantage. I've read many articles on motorcycle lubrication and the prevaling wisdom is that synthetics are the preferred product to use. I have never seen one article to recommend otherwise.

My Harley runs a 50/50 combo of Royal Purple 20w50 and Nitro-50 racing oil (both synthetics) and at 66k miles of operation through cold nights in CO to 110°F runs across TX in August it shows no signs of wear gauged from oil consumption and compression. Analyses run after 5k drains show that the oil is healthy, doing its job, and engine wear revealed from wear-metal content at a very low level.

I have also run synthetic in my air-cooled tractor mower for eight years with no problems, though the rest of the mower is falling apart around the engine.

• Synthetic oils and heat transfer...anybody have any data?, bryan , Tue, 26 Jun 2001 15:36:31
  • Re: anybody have any data -- gut feel tho, julz, Wed, 27 Jun 2001 12:44:43
  • Re: Synthetic oils and heat transfer...?, Andrew , Tue, 26 Jun 2001 23:05:08
    • Synthetics in air-cooled engines, Robert Davis, Wed, 27 Jun 2001 14:50:10 <-- Viewing This Message
  • Re: data, Sjer, Tue, 26 Jun 2001 16:56:48
    • Turbo cooling: true for most 9000s..., BillJ, Tue, 26 Jun 2001 18:45:24
      • Actually, in the USA, water cooled turbos came in '87 on the 9000, Aaron Gilbert, Tue, 26 Jun 2001 23:28:48
      • BillJ. whats new with wistling of your turbo/air stsem ? n/m, Daren, Tue, 26 Jun 2001 20:27:09
        • Still there..., BillJ, Wed, 27 Jun 2001 02:28:53
          • As an experiment in turbo cooling, try a 50/50 blend in your, Daren, Wed, 27 Jun 2001 13:11:55
            • 5W40 full synthetic, BillJ, Wed, 27 Jun 2001 15:49:02
          • You wanna know something funny..., Jay S, Wed, 27 Jun 2001 10:56:28
            • Now that's interesting, because..., BillJ, Wed, 27 Jun 2001 15:53:27

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