The owners manual says to use Crosman RMCOIL in the compression chamber every few hundred shots. I use the RMCOIL on the hinges. Never use any other oil on the rifle it could damage the seal. Never use regular gun cleaning equipment of solvents on the Quest it will damage the parts and seals.
See the link below for the RMCOIL and the Owners manual. See the Maintenance section of the manual for how to use the Rmcoil.
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