A drop of oil is all you need. Do it after every time you wash the bike. Same thing with the der pivots.
Better to oil frequently than to only lube when you take it apart.
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Il faut de l'audace, encore de l'audace, toujours de l'audace
1980 3Rensho-- 1975 Raleigh Sprite 3spd
1990s Raleigh M20 MTB--2007 Windsor Hour (track)
1988 Ducati 750 F1