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  #18  
Old 03-10-2009, 09:37 PM
n3up n3up is offline
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Join Date: Oct 2008
Location: Aston, Pa
Vehicle: 1997 Ford F-150
Posts: 52
I believe Ford put out a TSB on Mercon vs Mercon V.

Mercon V is now spec'd by Ford for use in older vehicles that spec'd Mercon. Vehicles that spec'd Mercon V cannot use the older Mercon fluid.

The TSB also mentions that Mercon was being discontinued.
I found Quakerstate Mercon V at Walmart...
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9 MPG was worth the look of shock on the parts guy's face when he would ask "Engine Size", and you'd say...7.5!
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