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Culbertson, MT | not especially. The Durango is just hard on fuel, although it is mostly a short-trip rig. The Yukon XL sees lots of highway miles, due to doctoring needs 275 miles 1-way! But, I don't feel that there is a significant improvement in economy (maybe just a bit). My thing with it is better oil=longer change intervals without problems=fewer oil changes=less used oil around! | |
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synthetic oils
