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Go with a good 5-40, run 5,000k intervals and never look back. Especially where you live, you will really notice the difference in cold starting. I don't ever plug mine in and it starts with no 'romp' on the rare 10 degree day we have here in WA. I think I'd still be plugging her in if it was much colder than that, synth or not. I like Shell Rotella, 19 bucks a gallon. I get great oil analysis results with 5k intervals. I wouldn't go much beyond that. You will have no leaks because of the switch. Runs smoother, quieter even. Maybe a touch better mpg... you can't go wrong.

I don't run 2 stroke oil, sometimes just some diesel keen or staynadyne if I have it but not that often.

Good luck - :icon_ford:

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