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If you have to put a quart in every 1000 miles or so, don't worry about it. If this consumption rate increases, then start to worry about it. Use whatever
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A True Z Fanatic
Join Date: May 2009
Location: Halifax
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Drives: '13 CTS-V, '76 Vette
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If you have to put a quart in every 1000 miles or so, don't worry about it. If this consumption rate increases, then start to worry about it. Use whatever oil turns your crank. There is no best oil. I use whatever synthetic 5W-30 is on sale and change the oil once a year regardless of mileage. Car runs perfect! Same goes for my truck, vette and civic. They also run great. I beat my vette hard but not the Z.
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"America.... still builds rockets!" Vette: 355 cid, 400 rwhp '13 CTS-V Coupe: 6.2L LSA, 556HP |
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#2 (permalink) | |
A True Z Fanatic
Join Date: Jan 2009
Location: Florida
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Drives: N54 135i
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Oil consumption will vary due to driving habits, but excessive consumption of this type of due to some type of engine component failure. Some people say toasted rings, others say valve seals- as far as I know, there has not been a 100% accepted cause for these particular problems in the 09 engines covered in the tsb. The VQ37 can/will consume oil to the tune of .5-1.5 quarts every 5k miles. Driving style and oil type will make the oil consumption vary. However, you should not have to add oil to the engine to keep it from going bone dry within the oil service interval. As far as how many people have had problems, I'd wager it's an overall very small amount (5% or less), but the amount of owners who have experienced issues is not necessarily indicative of the amount of engines that actually have the oil consumption problem to some degree. Many (most?) owners will not pay attention to the vehicle enough to notice oil consumption without major indication or engine failure, imo. |
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