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Is extreme oil consumption the only give away of a pre-cat failure? When viewing a car what else can I check to determine if the pre-cats are failing and going back into the engine? I cant open up someone elses car and start checking the pre-cats so is there any other way? My current 14 y/o car uses around 100ml per 1000 miles so I wouldn't be surprised if the pre-facelift mk3 uses oil too but how much is too much? I read someone's car was using 400ml per 1100 miles and the forum members said its within limits.
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Also this will be my first purchase without help so any advice is greatly appreciated.
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The car is high mileage but has full service history.
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Thank you.
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