We bought a can of Teak Oil when we bought our dining table in 1980. Think we've used the oil on it twice since, certainly still got same tin. Whether that's because Mrs K is worried about explosions or that we have a common 'can't be arsed' gene I know not
We now have a small surface in the kitchen that we're supposed to oil regularly, done it twice in 2 years. Might get done again before 2022 and might not. Can't be too safe and all that