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My son has a Vauxhall Astra 1.6 Car new last August it is using nearly a litre per 1000 miles, the main Vauxhall dealer says it is normal. I just cannot believe this is normal usage of oil.
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This has been covered in earlier threads, and you might find it useful to search back. Most manufacturers regard 1,000 miles per litre as reasonable, although most modern engines do indeed use much less than this.
You don't say what total mileage the car has now done, but high oil consumption in the first 5,000 is not unusual, until the rings have bedded in. If a synthetic or semi-synthetic oil has been introduced early in the cars life, before the rings and bores have got to know each other, the bedding process may have been halted, known as "bore glazing". If it has been dealer serviced they will probably have used GM's own 10/40 semi-synthetic. You could try reverting to a basic spec mineral oil, and driving the car a bit harder, for a while in order to de-glaze the bores. Once / if the consumption improves, go back to the higher spec stuff.
I have heard that one respected racing engine manufacturer actually injects a household scouring solution into the cylinders during bench testing if they suspect a bore glazing problem, as this roughs up the bores at bit and gives the rings a second chance at bedding in. I don't suggest this drastic course of action, however, as I am sure they do it in a very precisely controlled manner !!
Good luck, Adam
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