True that...need to know what engine and fuel you're running please....[&:]
ORIGINAL: Fuel Crazy
i run all the time when its in the 30's and 40's here... my engines do not like hot plugs though. Just remember when its cold out, the air is denser..so you need to tune a little richer.
I run cold plugs in my engines in the winter here... they dont like hot plugs, and only mediums they seem to like are O'donnell.