Oil Mania

The Oil Mania slot by NextGen Gaming offers both mobile and desktop players the opportunity to go drilling for oil for a chance to strike it rich. The slot is based on an affluent oil tycoon, whose Texas oilfields have enabled him to buy a flashy sports car and carry a suitcase packed with hundred dollar bills wherever he goes. Oil Mania also makes use of an exciting NextGen special feature called Upwild that allows jets of wild symbols to burst up from the wells beneath the reels to potentially create massive wins while you enjoy three free spins. The game's top jackpot is worth an impressive 2,500 times your bet, and as you can adjust the number of paylines, you can take each spin for as little as 1p!

More about the Software Provider

Although NextGen Gaming was formed in Australia in 1999, it has since grown a worldwide market thanks to its innovative approach of creating slots, scratch cards, and casino games. The company has partnered with hundreds of gambling operators and software vendors in both the land-based and online casino industry. Some of the brand's trademark special features which you'll find in slots like Merlin's Millions, Crocodopolis, Unicorn Legend, and Medusa II include SuperBet, Slide a Wild, DynaReel, and Select a Play. SuperBet is the most commonly used special feature in NextGen Gaming's online slots, and you'll find it in slot games such as Foxin' Wins, Wild Play SuperBet, Miss Midas, and Robin Hood: Prince of Tweets.

Appearance and Sound Effects

Oil Mania is set in a huge oilfield, with towering oil rigs reaching up into the dawn sky. When the reels aren't in motion, you can hear the lonely sounds of crows cawing, but once you start to spin the reels, a slow country music soundtrack begins to play, and there are the noises of drilling commencing.

The reels sit on top of an oil-soaked underground tank, and the kinds of symbols you'll encounter include a mechanic in green overalls, a suitcase full of cash, a gold classic sports car, a graph, an oil tycoon smoking a cigar, a jet of oil, and six playing card symbols.

Bonuses and Special Features

Oil Mania offers a very unusual special feature for an online slots game, and it's called the Upwild. The Upwild feature is triggered when one or more Oil Tycoon symbols appears anywhere on the second, third or fourth reel. The feature causes a jet of oil to spurt up from the well underneath the respective reel, and it adds one wild symbol to each vertical reel position for three spins before disappearing. If, while you're playing through your free spins, another Oil Tycoon symbol lands on a different reel, the number of free spins remaining to reset to three, and a new Upwild starts to grow underneath the other reel.

Oil Mania also comes with a Gamble option that allows you to try and double or quadruple each win via a simple playing card guessing game.


Oil Mania uses five reels, three rows of symbols, and twenty-five non-fixed paylines, and has an average RTP (Return to Player Rate) of 95.66%. The game lets you create winning combos using matching symbols in succession from the leftmost reel to the rightmost reel.

Mobile Compatibility

The game is designed to work with desktops, laptops, mobile phones, and tablets, and includes mobile-optimised game controls when played on mobile devices.

Our Verdict

Oil Mania is a light-hearted slots game with excellent animations that offers generous prizes. Its interesting and unusual Upwild Feature is definitely worth checking out as it can create streams of wild symbols on the reels for maximum winning opportunities.