We took a look at Petrol Usage Tracker for BlackBerry 10 just a short while ago and it's a great little tool to have on your BlackBerry 10 smartphone for both business and personal use if you need/want to keep an eye on how much you're spending on fuel.
After some hard work from S4BB the app has been updated - now with multi-car support, which according to them wasn't easy to do but they pulled it off. As you'll see below there are some added further improvements and fixes:
Added import of CSV
Moved Export & Import to application menus (swipe from top)
Added visual aids to find the application menu (to access options to change currency and measurement units)
Minor bug fixes
Although the app is a free download and allows you 100 top ups, if you want to take full advantage of the multi-car support and all features there are some small costs involved:
1 car and 100 top ups - Free
1 car and unlimited top ups - $0.99
2 cars and unlimited top ups - $1.99
Unlimited cars and unlimited top ups - $4.99
The app is available for all BlackBerry 10 handsets including the soon to be released BlackBerry Z3.