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Old 01-21-2019, 02:08 PM
rocky raccoon rocky raccoon is offline
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Join Date: Oct 2007
Location: Greater Metropolitan Beaverdam VA
Posts: 2,877
15w-40 is fine if it is synthetic. A topped-off battery is necessary since battery internal resistance goes up sharply in very cold weather.

I use 15w-40 AMSOIL and my engine is running smoothly within the first revolution after i single glow cycle.
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