Everybody’s talking about ways to save gas nowadays. I can’t even get through a week of blog posts without mentioning gas prices or fuel economy at least three times because that’s literally 90 percent of the automobile-related stories going around. But this post is about a new item you can use to monitor your fuel usage in real time so you can adapt your driving habits accordingly.

The Scanguage, a three-in-one automotive computer designed by Linear-Logic, monitors your fuel usage every second while you’re driving. The unit is about the size of one of those removable faceplates you get with some of today’s car stereos and you can mount it underneath your dashboard controls. Once it’s connected properly, all you need to do is glance at it while you’re driving to see how many miles per gallon you’re getting at any given time.

That’s not all the Scanguage does, though. This nifty device also scans your engine to find any potential problems before they become major problems. If you’re “Check Engine” light has come on, this little computer can often tell you what the problem is so you can fix it before it becomes too costly.

Many of the newer Ford trucks on the market already have something similar already installed in them. But if you have an older truck (but one that was built after 1996), you can get this device for less than $200. It might take a little while to reap the benefits of a $200 mechanism, but since you can transfer it to different vehicles, it’s a rather smart investment.