Answer: lubed

AnswerCrossword Clue
LUBED

Did a service-station job

LUBED

Did a mechanic's job

LUBED

Did a chassis job

LUBED
Greased
LUBED
Applied grease to
LUBEDApplied oil to
LUBEDLike smooth-running engines
LUBEDUnlikely to rattle or squeak, say