The Crew Module side hatch cover is removed, and the seals are greased, cleaned and inspected before the 500-pound hatch door is shut and latched using special tools, including a socket wrench and ratchet.
—
Miles Doran,
CBS News,
1 Apr. 2026
Ethanol is also a solvent that can eat away at delicate rubber seals and plastics in older engines, potentially causing major damage, which is one of the reasons why it’s usually capped at 10%.
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