> For the complete documentation index, see [llms.txt](https://docs.thriveonmars.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.thriveonmars.com/how-to-play/select-a-specialty/refueler.md). # Refueler **Power rockets and receive a cut of the cargo.** Refuelers specialize in powering rocket convoys that travel between Earth and Mars. In exchange, they’re offered a piece of the action — a cut from every convoy is randomly allocated to Fuel contributors. *** **Relevant Item Types:** 1. Fuel Generator 2. Fuel Plant **Strategic Resource Production:** 1. Fuel **Appeals to:** Players who want to grow their resource production from equipment, vehicles and astronauts. *** ### Progression Requirements | **RANK** | **EFFICIENCY** | **FUEL** | | -------- | --------------------- | --------- | | 1 | 50% for 1 day | 50 | | 2 | 60% for 2 extra days | 200 | | 3 | 65% for 3 extra days | 500 | | 4 | 70% for 4 extra days | 1,000 | | 5 | 75% for 5 extra days | 2,000 | | 6 | 80% for 6 extra days | 4,000 | | 7 | 85% for 7 extra days | 7,000 | | 8 | 86% for 8 extra days | 11,000 | | 9 | 87% for 9 extra days | 18,000 | | 10 | 88% for 10 extra days | 29,000 | | 11 | 89% for 11 extra days | 46,000 | | 12 | 90% for 12 extra days | 70,000 | | 13 | 91% for 13 extra days | 110,000 | | 14 | 92% for 14 extra days | 160,000 | | 15 | 93% for 15 extra days | 240,000 | | 16 | 94% for 16 extra days | 350,000 | | 17 | 95% for 17 extra days | 510,000 | | 18 | 96% for 18 extra days | 740,000 | | 19 | 97% for 19 extra days | 1,100,000 | | 20 | 98% for 20 extra days | 1,500,000 | ### Progression Rewards **Cumulative Production Increase Reward** FUEL outputs are % higher for Fuel Generator and Fuel Plant. **Cumulative Input Reduction Reward** ALL inputs are % lower for Fuel Generator and Fuel Plant. **Cumulative Resistance Increase Reward** Fuel Generator and Fuel Plant have % increase in resistance. **Cumulative Repair Reduction Reward** Fuel Generator and Fuel Plant have % reduction in repair and reactivation cost.
RANKNFT REWARDCUMULATIVE PRODUCTION INCREASECUMULATIVE CONSUMPTION REDUCTIONCUMULATIVE RESISTANCE INCREASECUMULATIVE REPAIR COST REDUCTIONSPECIALS
1Standard1%
2 1%
3 1%
4 1%
5Shadow2%
6 2%
7 2%
8 2%
9Steel3% Receive a 10% boost to your Fuel colony development contributions.
10 3%
11 3%
12 3%
13Gold4% Receive a 20% boost to your Fuel colony development contributions.
14 4%
15 4%
16 4%
17Dark Matter5%5% Receive a 35% boost to your Fuel colony development contributions.
18 5%
19 5%
20Solar Flare10%10%10%10%

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