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Miata Mailing List: October 1994, Message #14
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From: mikef@mer-mail.ctron.com (Michael Friedman) Subject: Syntec vs. Gas Mileage Date: Mon, 3 Oct 1994 09:04:24 -0400
Well, I've had the Castrol Syntec in my engine for a little over 100 miles now, and although I don't notice any difference in the way the engine runs, I have notices a definate increase in gas mileage. While using the old GTX 20-50 my mileage was a steady 28-30 mpg. The last 4 or 5 tankfuls (all "normal" commuting) have been 32-33 mpg. I've only ever seen above 30 on long highway trips prior to now. It has been cooler here in New Hampshire during the last month, but usually cooler weather makes the gas mileage worse, not better... Any one else notice similar effects? Mike