Oil Bonanza slot: RTP and max win
Oil Bonanza is a low-volatility slot by Nebula Reel Works on Stake Engine, released 14 Apr 2026. Its base game returns 95.02%, below the median Engine slot (96.02%). The top payout is 1,500× the bet; from a base spin it lands about once every 100,000 spins. It has 1 bonus buy priced at 20× the bet; the best returns 94.93%, so each buy costs 1.01× the bet on average over the long run. It is the No. 4142 most played Engine slot over the last 30 days.
Every mode, side by side
Costs are multiples of the base bet. Odds come from the published outcome table for v37. "Returns the cost" counts rounds that pay back at least what the mode cost. Expected cost is cost × (1 − RTP): the average amount lost per round over the long run.
| Mode | Type | Cost | RTP | Max win | Max win odds | Pays anything | Returns the cost | Expected cost per round | |
|---|---|---|---|---|---|---|---|---|---|
| Base | Base spin | 1.00× | 95.02% | 1,500× | 1 in 100,000 | 1 in 3.05 | 1 in 7.30 | 0.05× base | Simulate |
| Bonus | Boosted spin | 3.00× | 95.38% | 1,500× | 1 in 11,111 | 1 in 2.85 | 1 in 6.58 | 0.14× base | Simulate |
| Mega | Bonus buy | 20× | 94.93% | 1,500× | 1 in 100,000 | – | 1 in 3.29 | 1.01× base | Simulate |
Work out the cost of Oil Bonanza bonus buys at your bet size
Version history
Base-mode RTP per published math version. Older versions stay public in the fairness API, so changes can be checked.
| Version | Base RTP | |
|---|---|---|
| v37 | 95.015% | Active |
Frequently asked
What is the RTP of Oil Bonanza?
Base spins return 95.02% of the amount wagered over the long run, from the published outcome table for version 37. Its bonus buy returns 94.93%.
What is the max win in Oil Bonanza and how likely is it?
The top payout is 1,500× the base bet. On a base spin it lands 1 in 100,000 spins. In the Mega buy (20×) 1,500× lands 1 in 100,000 buys.
Does Oil Bonanza have a bonus buy, and what does it cost?
Yes, 1 buy mode. Mega: 20× the base bet, 94.93% RTP, an expected cost of 1.01× the base bet per buy.
Is Oil Bonanza high or low volatility?
Low. Its base-mode standard deviation is 8.2× the bet, which puts it in the lowest third of Engine games. What volatility means.
Can I check that a result was fair?
Yes. Engine games use provably fair seeds. Once your server seed is revealed you can replay any round against the published outcome table. See how to verify a result.
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