Motor Trend has some new rumors on the next-generation Lexus GS expected to debut in 2011, including some questionable information on engine specifications that make me doubt their source: Gone is the current 4.6-liter V-8, replaced by a 2.5-liter V-6—most likely a version of the engine presently found in the IS. The present 3.5-liter V-6 …

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