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2007 FORD TRUCKS E350 VAN 5.4L 8-cyl Engine Code [L]
Ford now says 0W-20 is the recommend viscosity.

Standard oil and years of brain washing says 3000 miles.

Amsoil has for over 30 Years recommended 25,000 miles or 1 year which ever comes first.

http://www.amsoil.com/catalog.aspx?code=ASMQT-EA

and the best filter on today's market to go long with it

http://www.amsoil.com/catalog.aspx?code=EAO11-EA

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16y ago

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