You're about to find out when you should be filling up your gas tank and exactly when you should avoid it, no matter where you live.

The crew at GasBuddy is looking out for us and our bottom lines. The results of a nationwide survey are in, time to start saving money at the pump.

Before looking at these results, you should know that Friday afternoons are when gas stations are their busiest, so what does that tell you about

If you live in Illinois...

The BEST day to buy gas is:

MONDAY (specifically in the morning)

The WORST day to buy gas is:

THURSDAY (specifically in the afternoon)


If you live in Wisconsin...

The BEST day to buy gas is:

TUESDAY

The WORST day to buy gas is:

SUNDAY

Thanks to MSN.com, you can see the results for all fifty states.