Using the Gas Cubby iPhone app to increase your fuel economy and keep your vehicle properly maintained can save you money and help the environment… but, if you’ve learned anything from CrunchGear, it’s that saving money isn’t much fun unless you can blow it on something cool and completely over the top. Well, one lucky CrunchGear reader gets to have their cake and eat it too. App Cubby, the developer of Gas Cubby, is giving away a Viper SmartStart kit to one lucky CrunchGear reader. If you own a car and an iPhone, surely you’ve heard about and have been lusting after Viper’s new technology that allows you to lock/unlock, open the trunk, and even start your car right from your iPhone.

And for those still behind the curve on using your iPhone to improve fuel economy and keep track of maintenance, Gas Cubby will be on sale for only $4.99 until Cyber Monday.

To enter, leave a comment below with your vision of “car 2.0.” How can mobile apps better integrate with vehicles to make your driving experience more fun, safe, efficient, and economical?

Note: CrunchGear and App Cubby will be awarding the winner a $500 gift certificate (the retail price of Viper’s SmartStart kit) to Best Buy. The winner will be have to handle compatibility, installation, etc.

We’ll pick a winner on Wednesday.

Congrats to Emanuel, our winner.