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Jarlaxle
Aug 13, 2010Explorer II
Rich, thanks. My friend who was an Army truck guy says we'd be okay with a V-10 F-250, including use of its air conditioning while hauling a 13,000 pound RV up Donner Pass twice a year in July (once each coming & going), as long as we use only synthetic oil, change that every 3000 miles and give it a tuneup, oil change and complete maintenance check before each RV trip.
You'll also be fine using whatever 5W-20 you can get the cheapest at Wal-Mart and changing it at 7500 miles.
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