Well, that would be factoring in the imperial gallon. Using American gallons it would come out to 26 mpg.

Still pretty good for a 4.3 liter V8 engined car weighing almost 2 tons.

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1987 300SDL (324000)

1986 Porsche 951 (944 Turbo) (166000)

1978 Porsche 924 (99000)

1996 Nissan Pathfinder R50 (201000)