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I just bought my 2010 550 GT in Nov' 19. I did research before I bought it and given relatively low price $8600, I took the risk. While the overall condition is nice, it was burning 1-2 quarts of oil every 2-3 fill ups, started checking into different oil, and after topping off 2 different times with 3 quarts of Royal Purple I have not had to add oil for a month and it is still full. After this experience I will probably stick with the RP.
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