It's Cold vs. Hot.

Which is better? If you read the Owner's Manual for your vehicle,
chances are you will find a section that suggests that you drive your vehicle immediately after starting, avoiding idling, and that you try to avoid driving short distances because the engine doesn't have enough time to reach operating temperature.

BlueHeat® is your smarter alternative to starting a cold engine because it pre-heats the engine. When you start the vehicle after using BlueHeat® the engine is immediately at or above the minimum operating temperature.