well my MPG has stayed the same as far as i can tell, and i think as far as atomizeing the gas goes we should be fine if the temps are over 45 right ? because i havent noticed any probs with it yet, i do feal better TB responce, but then again its been in the upper 70s and low 80s here in pasadena latly...... i know alot of people say 32 , but that was to keep the TB from freezing and locking up