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If you used the thrid party engine oil, and the car stopped working, who would you sue?
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Depends why the car stopped working. If it was due to some inherent difference between the recommended oil and the 3rd party oil used, then maybe you could sue the 3rd party oil manufacturer (if they made false claims regarding their product), or maybe there would be no cause for action.
But if the failure was due to the car manufacturer deliberately and unnecessarily modifying the car after you had bought it so that it disabled the car when a non-recommended oil brand was detected, and the car manufacturer had not informed you that this was a possibility when you bought the car, then I should think there is indeed a case for suing the car manufacturer.
Same thing applies if your washing machine refuses to work unless you use its recommended laundry detergent.
Biting the hand that feeds IT
