Therefore we can assume that the oil consumption is actually about correct for this engine, as our calculation, based on our assumptions says we should of used more than has actually been consumed. Over 100 hours, at 916.3kWm, the oil consumption would be:Īt 20 degrees C, the density of 15W40 oil is about 0.8787 Kg/L. The average for a prime load should be 70% load factor, so we will use 70% as the figure for calculation, as the customer has not specified a load level. The 4012-46TAG2A engine will produce 1309kWm at prime rating. "After running in (typically after 250 hours) g/kWhr 0.52" You should also use oil only from reputable sources! If you cannot be confident of the source, you cannot be sure you have the right grade, or that its performance will match the required standards.Įxample calculation of engine oil consumptionĪ customer enquires if the Perkins 4012-46TAG2A engine should of used 40L of oil in its first 100 hours of use. A different grade may cause engine wear leading to shorter engine life and increase oil consumption. The grade of oil used: If you use a grade of oil that differs from the engine manufacturers recommendations, you might see increased oil consumption.Engine Size: The larger the engine, of course, the more oil it is likely to use.At low load levels (under 30%) for long periods the lower pressure in the cylinders will cause the oil to seep past the piston rings, so at low levels of load, you would expect the amount of oil to increase again from the quoted level. Engine loading: The engines oil consumption will often be quoted in g/kWh, therefore the higher the running load, the more oil will be consumed.If you’re real lucky, it’s leaking the oil rather than burning it. It’s probably no longer under warranty so have your checkbook handy. That’s a guess since you didn’t specify how many miles but it’s obviously not good even if you’re driving twice that. For example, if the piston rings are warn, you may notice higher oil consumption as the oil moves past the rings. Based on the national average, that’s about a quart every 260 miles. Its Condition: An engine is good condition will use less oil than one that is old and/or badly maintained.Typically it will be run in after 250 hours. Therefore it might be a little higher than its specification sheet. Age of engine: A new engine may use a bit more oil until it is run in.in 2002.We get many questions on what oil consumption is normal - the answer is it depends! What does it depend on? The key points are: This was literally the cheapest economy car you could buy in the U.S. Even my Daewoo, which was apparently overheated by a previous owner (according to the machinist who reconditioned the cyl. My current work truck, a 2005 Toyota Tundra has close to a quarter of a million miles on it, and I check the oil every two weeks, and it has never consumed a noticeable amount of oil. Why is it that people got away with using whatever oil was available, and/or doing lax maintenance on their cars 20 years ago, but now all of a sudden you need special oil or else accelerated engine wear will occur? I remember back in the 2000’s, I knew many people who owned cars from the early to mid 1990’s and generally treated them like crap, but they kept running and did not consume oil or coolant.įor the record, I have never owned a car, or been assigned a work truck which consumed a measurable amount of oil– even with over 200,000 miles on the odometer. Have you been using the proper VW/Audi spec oil? And changing it as often (or more) as recommended by Audi
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