3/8/2023 0 Comments Oil consumption testAt that point you return to the dealer, they drain the engine again and carefully measure how much is left. You are then asked to drive 500 miles, or until the one litre warning comes on, whichever is first. For this they will drain your car of oil, then fill it up with a carefully measured volume so they know exactly how much is in the engine. However, for Audi to do any corrective work you need to have an official consumption test done by a main dealer. (this is correct for 2.0 engines, I am not sure the spec mileage for other engines) In practise if you are getting anything under 2000 miles you probably have the problem, but Audi won’t acknowledge it until you get below 1200 miles. When the one litre message comes up if you’ve done less than 1200 miles you have the problem. Top up your oil then reset your odometer. ![]() If you have a different engine and find information that contradicts this FAQ, please post below and I will update. The following advice should be generally applicable for any owner with oil problems, but is primarily based on the experience of 2.0 owners. Again, S5’s are far less common than 2.0 TFSI A5s, so that may be the reason there are few reports of this. It is unclear whether this is because the 1.8 is less susceptible to the problem, or there are simply less 1.8 engines in existence.ĭiesels engines are not affected, but there have been isolated reports of the larger petrol engines such as those found in the S5 also having an oil problem, but it’s unclear if this is the same issue. There have been far fewer reports from 1.8 owners and information is harder to find. The overwhelming majority of reports are for the 2.0, but 1.8 TFSI is also affected. But all A5 TFSI engines before that, i.e. The problem seems to have been corrected when the facelift was released. Engine codes known to be affected include CAEB, CDNC and CNDC (list being updated). The 2.0 and 1.8 TFSI engines prior to 2012. However, many 2.0 TFSI owners routinely get only around 500-600 miles, which is definitely out of spec. (Other engines may have different specifications, please check your manual to confirm) This is written in the manual if you look in the section on oil. Note that the Audi specification for the 2.0 engines allows for a quart of oil to be used every 1,000 miles, and they will not consider this level of usage to be a fault. One theory is that these grooves cause more and more oil to leak around the pistons, hence the problem gets progressively worse. In advanced cases there can be noticeable smoke from the exhaust under heavy acceleration, and it is also known to damage the actual cylinders themselves, causing scoring in the bores. ![]() Over time this problem gets worse, and the range you can drive before needing to add oil steadily drops. When this comes up you don’t need to immediately stop, but you should add a litre of correct grade oil as promptly as you can. The typical way drivers become aware of this is when the ‘add one litre of oil’ notice comes up on the dashboard. The base problem seems to relate to the piston rings, which allow small amounts of oil to leak round the pistons into the cylinders, where it burns and therefore leads to high oil consumption. The early version of the TFSI gasoline engines found in the A5, A4 and Q5 have an inherent design fault which leads to high consumption of oil.
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