Today it is -3C where I live. Average temp is about 5C for this time of year. My 4.2 liter had way more zip this morning. I understand from my bike days that on cold mornings the oxygen is more dense therefore more bang for your buck in the cylinder, pun intended. Is there anyway to figure out how much more? It was a noticeable increase in power. Would this be what a K and N filter is like on a normal day? Should I simply move to the Yukon AND wear bigger shoes to get more power? {rhetorical, my wife wouldn't hear of it }.

Phil