YA!!!!!! I new people always said ya my car runs better in colder weather...but then some people say heat is better..I dunno! After letting that set for 30min! I was like HOLY COW!!! I could even FEEL a difference! LOL I was SOO excited to get my slip to see what I had ran!!! But what we did was laid a towel on it then a BLOCK of ice still in the bag and it sat there for 30min. I started the car up got in line and ran! I was the mosttttt excited! LOL