Load Warp Fuel into the Slipstream Drive
The documented fuel for the Slipstream Drive is Warp Fuel. The developer's September playtest notes clarified that the drive accepts Warp Fuel only. On the official Main Sequence Steam news page, look for Playtest 2 Patch 4, which records the change to the English tutorial.
Check the actual item before changing the ship
If the drive rejects a supply, read the item's name and compare it with Warp Fuel in the tutorial. Then check the drive itself to see whether the intended item has arrived. This separates an item-selection problem from a supply that never reached the module.
Once you see the fuel at the drive, use the range or travel information in your current build before choosing a destination. The patch note identifies the fuel type. It does not specify a recipe, fuel budget, or travel distance.
Keep the two progression milestones separate
The September notes discuss the Slipstream Drive separately from the later Interstellar Warp Drive, which the developer tied to progression beyond the starting solar system. If you are troubleshooting a Slipstream trip, start with the item the Slipstream tutorial names and the destination your current drive can reach.
FAQ
Can I use another fuel in the Slipstream Drive?
The September playtest clarification specifies Warp Fuel as the only accepted item.
Does the patch note give a Warp Fuel recipe?
It clarifies what the drive accepts. Check the recipe displayed in your game build for ingredients and quantities.
Does this describe the Interstellar Warp Drive too?
This fuel rule was documented for the Slipstream Drive. The developer described Interstellar Warp Drive research as a later milestone.