Does caloric restriction after 60 still gain several years of life?

I wouldn’t recommend caloric restriction in the standard sense for any age group.

I would however recommend OMAD which is one meal a day, the side of this is that it restricts calories indirectly and has massive health benefits without any of the normal downsides of a normal caloric restrictive diet.

OMAD goes very well with Keto (very high, organic good fats)

Cardio+weight training makes you younger.