Tank131
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Actually the oil leaks are relatively common. What happens is that seals are not fully expanded when the aircraft is on the ground and cold. As it flies its surfaces heat up and expand causing the seals to tighten closing the leaks. Thats normal. IF they were fully sealed at idle they would tear the seals at speed and it would be leak city. The SR-71 was famously made with loose surfaces and leaked fuel and oil regularly while on the ground. At speed the surfaces expanded creating tight seals.
https://www.sr-71.org/blackbird
https://www.sr-71.org/blackbird