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Originally Posted by rekcsk@cox.net What is the octane rating of the fuel that is suppose to be used in the 2006 DTS? My 2005 DeVille used 87 octane, and the DTS has the same engine, so is it the same? I intend to order a 2007 when I find out the new interior color combinations, such as seats, dash board, floor carpete color. |
They told me no ethanol on DTS (non-performance) Told me 87 Unleaded regular okay although they recommend premium. Said you lose a few HPs if you use regular unleaded. Also said put a tank of premium in every now in then that it helps motor