After 64,000 miles, my GT350 started consuming a bit more oil. It has been fairly consistent up until this point requiring 1 qt every 1250 miles. It seems like now that has gone down to 750 miles. The only thing that changed is now the car is kept outside and cold starts when ambient is around 40F does take about 10 minutes for the car to reach to 150F coolant (so I have to idle it as I dont want to drive it right away due to very heavy oil). Is this normal? Is it simply the tolerances built around the pistons for track use do not play nice with very cold temps where the metal needs to expand a bit more to close that gap? Or is it the open loop in cold start that is dumping too much gas to get the catalysts up to temp which is eating away the oil as it leaks inside?