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Old 03-28-2015, 12:06 PM   #23 (permalink)
101Volts
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Join Date: Dec 2012
Location: Pennsylvania
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Woody - '90 Mercury Grand Marquis Wagon LS
Last 3: 19.57 mpg (US)

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Last 3: 12.94 mpg (US)

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90 day: 17.09 mpg (US)

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I was looking up Differential Fluids and Autozone's computer suggests 80w90. But is there any problem with running 75w90? I saw some nice Mobil-1 Full Synthetic in there which I was thinking of using.
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