Fuel savings
In brief:Fuel savings — an Xterium research: gives engines consumption +40% at maximum, up to 20 upgrade levels, cost 5 000–500 000 000 science.
(data current as of 2026-05-22, game version 2.12.7)
Description
Deuterium is a very valuable resource for profligiously burning it in engines with low efficiency. Do not forget that effective management of the economy is the foundation of the well-being of your Empire.
What it gives
Levels: effect and price
| Level | Engines consumption | Science (price) |
|---|---|---|
| 1 | +2% | 5 000 |
| 4 | +8% | 17 500 |
| 7 | +14% | 63 500 |
| 10 | +20% | 265 000 |
| 13 | +26% | 4 000 000 |
| 16 | +32% | 100 000 000 |
| 19 | +38% | 400 000 000 |
| 20 | +40% | 500 000 000 |
Reference levels are shown. The study price is in Science points (values, they grow with the level). It can be instantly sped up with Dark Matter.
What else strengthens these bonuses
Alliance Skills 1
Permanent alliance skills. Leveled up by the alliance using shared points and applied to all members.
Senators 1
The colony's permanent command staff. Each senator has a specialization and, once assigned, gives the colony a set of permanent bonuses that grow with their level.
Science price and calculator
How much science each level needs:
Calculator: time and instant speed-up
Enter your science and choose a level — we'll show how long the research takes and how much dark matter is needed to finish it instantly.
Formulas verified: time = science price ÷ your science per hour (but no less than price ÷ 5), divided by research speed. Instant completion is calculated by the dark matter for the remaining time. Overlock multiplies the science price (and thus the time and dark matter): each overlock level is pricier.
Overclock (honing)
After the maximum level, the research can be “honed” with star ore — this gives a super-bonus.
Engines consumption · first reset 150 star ore
Each reset adds the bonus on top of the max level; the star-ore price grows with every reset.
Requirements
To unlock this research, you need to raise the following to the required level:
Research is upgraded in the Laboratory and the Technopolis.
