Is it our fault that our Corsa's oil level dropped and the engine started knocking?

My niece’s 18-month-old Vauxhall Corsa engine started to knock. This was due to low engine oil. I know that oil should be checked on a regular basis, but with today’s technology the engine oil light should have warned against this. The Vauxhall dealer stated that it was my niece’s fault for not checking the oil. How does she stand in all this? She won't be replacing this car with another Vauxhall.
The engine oil light only warns of low oil pressure. It does not warn of low oil level. It is the driver's job to check that regularly with the dipstick. And this is true of virtually every car, except those that have 'electronic' dipsticks.
Answered by Honest John on

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