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Switched my 2019 540i to Liqui Moly 5W40 Leichtlauf High Tech last week. Made a 650 mile road trip over the weekend during which my average speed was 67.2 mph and fuel consumption was 33.2 mpg. The vehicle ran as smooth as ever and I certainly didn't notice any drop in fuel economy. I'm planning to stick with this oil and change it every 7,500 miles.
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