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Book of Oil Slot - Review, Free & Demo Play

The big oil corporations = money and Endorphina took inspiration from this industry to create a slot with quite an interesting theme. Introducing Book of Oil, released on 17/09/2021 and here you get a chance at winning a very impressive prize worth a maximum of 10,000x your stake. To help you out with this nice prize, the slot offers not only a Free Games aka free spins feature with expanding symbols but you can even purchase this feature or gamble your winnings to increase the sum. So let’s take a look at how to use these features to your advantage and where you can play Book of Oil for free or real money!

Book of Oil Free Play

Book of Oil logo
Endorphina Release Date: 17.09.2021
Rating by Joe Booth
User’s Rating:
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Book of Oil
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Best Casinos to Play Book of Oil for Real Money

Although you can play the demo and enjoy this online slot for free, if you wish to try your luck winning real prizes, then you need to play Book of Oil for real money, which is only possible via casino. So, in case you don't know where to play, or you want to find the safest, most popular and just the best casinos, then we have made the following list just for you. These are not only the finest places where you can check out Book of Oil or any other games, but you can even get different bonuses from these casinos!

  • Mostbet Casino logo
    Mostbet Casino  review
  • Royal Reels logo
    Royal Reels  review
  • Sloterra logo
    Sloterra  review

General information about Book of Oil slot

Release Date:
Max. win:
Bonus game:
Free spins:
Scatter Symbol:
Wild symbol:
Symbol Stacked:
Jackpot Game:
Slot lines:
Slot reels:
Stakes range (€/£/$):
0.01 to 30
Slot Theme:
Oil production

How to Play

The gamefield of The Book of Oil slot consists of 3 rows and 5 reels, and 10 paylines, that can be adjusted. And while the slot doesn’t have a lot of features, per se, but the ones that the game does have are very useful, especially the Bonus Pop feature which allows you to buy the Free Games bonus game. While we are going to take a look at these features below, its understandable that you may also like to check this game out in the demo mode or start playing right away, and in that case, let us show you how to navigate Book of Oil:

  • Launch the slot, and after it loads you can click the list icon on the left side of the screen, next to paylines, to access the settings menu of the Book of Oil
  • Set the number of paylines you need - from 1 to 10. The more lines the more winning chances you have, but it will also increase the bet size
  • Select how much you want to bet/spin: the lowest stake is €0.01 while the maximum you can bet here is €30
  • Read about the features and symbol value in the information menu (button “i”)
  • If you want to start playing in regular mode, you can just hit the “spin” button, but you can also purchase the Free Games feature via Bonus Pop and start playing with this game mode already active!

Book of Oil RTP and Volatility

The online slot Book of Oil offers an RTP of 96.05% and a medium level of volatility.

The medium risk level of the Book of Oil means that this slot is somewhere in the middle between low and high-volatility video slots - so winning here will be slightly easier than in games with high risk, and the size of the winnings will be slightly bigger than on slot machines of lower volatility. Basically, it's the best of both worlds, and medium variance is perfect for most of the players. Other than nice volatility, the RTP of the Book of Oil is also decent, and the slot pays back 96.05%.



Here you enter a desert landscape on the outskirts of a city that appears to have been built with petrodollars in Book of Oil, a slot machine from game designer Endorphina. The theme of the book follows from their Book of Santa slot.

The game's overall design is reminiscent of the era of the modern oilman, with well-designed symbols including pumping stations and barrels.

The soundtrack features woodwinds and an electronic keyboard playing a funky tune.

Here's what the paytable looks like for landing 5 same symbols:

  • Oil Man = 500x
  • Pump Jack= 200x
  • Barrels/Dollars = 75x
  • Ace/King = 15x
  • Queen/Jack/10 = 10x

The game has a double Wild, and a Scatter in the form of a book symbol, which is responsible for crucial functions.

Book of Oil
Book of Oil Slot - Paytable

Mobile Compatibility

Book of Oil Slot Mobile
Although there is no app for Book of Oil, this slot still works perfectly and smoothly on mobile devices. You just need to open the browser of your gadget, locate the Book of Oil game and launch it! No matter where you play the features of the Book of Oil slot remain the same, so you are not missing out on any gameplay details if you play from a phone or tablet.

About Endorphina

Endorphina is one of the most popular providers on the market that creates online slots. Endorphina creates games for different segments of gamers, from beginners to experienced high-risk players.

In the company's library, you can find games of various genres, such as adventure, classic, mystic, horror, and ethnic stories.

Bonus Rounds & Free Spins


Gamble Feature

You can take advantage of the Book of Oil bonus game and double your winnings up to 10 times.

After a winning combination, the opportunity to play a game of chance is available, in which the player tries to beat the dealer by choosing 1 of 4 cards facing down. If you continue your winning streak, you will have 10 chances to double your winnings.

Free Spins

Ten free spins are awarded when 3 or more Scatter symbols appear on the reels. A random symbol is selected and can expand when enough symbols land to form a payline. In this game mode, their position does not matter. Only their number matters to trigger the expansion. They expand to cover the respective reels when there are enough of them. Big wins are potentially available at this stage of the game.
Book of Oil Slot - Free Spins

Bonus Pop

The Bonus Pop feature allows you to buy 10 free games and even select your expanding symbol. The price of this bonus buy depends on your stake and which symbol you choose, and the slot will calculate the exact price for you.

Book of Oil Demo Play

There is a special version of the Book of Oil in which all the gameplay is free, and you don't need to register at a casino or pay to play this slot. This is the demo version, and it offers exactly the same gameplay and possibilities as the for-the-money version, except that in the demo of Book of Oil you cannot win actual money.

Max Win

The maximum win in Book of Oil multiplies your stake by 10,000x.

You can win a jackpot that increases your bet while playing Book of Oil by 10,000x, which is considered an average, if not good.

It would help if you used the Wild symbol and free spins, as well as the gamble feature to get closer to the maximum win. Also, while Book of Oil doesn’t offer a jackpot, you can buy the Free Games feature via Bonus Pop, which we think would be pretty useful for you.

Overall Rating


Book of Oil online slot is an interesting online slot with a fascinating theme. There is a wild symbol and free spins here, and you can also win up to 10,000x.

You will also get here the average volatility and the average RTP. Book of Oil is sure to appeal to all fans of original themes.

Interesting topic
Free spins
Max win of 10,000x
Possibility to buy free spins
Not a lot of features


What is the maximum win in the Book of Oil Online Slot?

The maximum win in Book of Oil is 10,000x your stake.

Does the Book of Oil slot support the mobile version?

Yes, you can play Book of Oil right in your mobile browser.

What is the level of volatility and RTP in the Book of Oil?

The online slot Book of Oil offers an RTP of 96.05% and a medium level of volatility.

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Joe Booth
Joe Booth
Expert in: News, Blog, Slot reviews
Joe is an expert online casino player, who knows all the tricks and tips on how to get to the most massive wins. He is also an experienced online casino games reviewer, with hundreds of written articles behind him, on all kinds of online casino games. He makes sure to play them, see how they work, and then gives his honest expert opinion about them to other players, our readers. 
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