I'll take a video with 5th gear and 6th gear comparisons at different benchmark speeds as well as the full spectrum from 1st gear. 1st gear is absolutely better. I'm headed to SLC tonight for a concert (silver sun pickups) so I can show you how it pulls through a climb in the canyon, highway entrance at 80+ and a bonus. I'll also show you mileage snapshots during the trip to kinda give you an idea. My city mileage is about 19-20 consistently and highway is almost always 25+. I got 30-31 mpg on a trip over the summer coming back from the Tetons. This was US 89 scenic route with lots of fun twisties and mountains.

Your mileage will almost always plummet in the winter due to winter fuel blends.

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2005 X5 3.0, 6MT, Alpine White on Truffle Brown, Sport, Preim, and Cold Weather, Alpina Stainless Headers, AFe Intake, UUC SSK, OEM 87's, 3.64 Differential Swap,Performance Modified Euro 2 Tune, UUC LTW Flywheel and HD clutch, Bilstein B12 Suspension kit
Future mods ZHP/Schrick Cam Shaft upgrade, Operation code name:Doppelschrauben-Kompressor

Wife's Ride: 2011 e70 X5 351 M///Sport.

Also in the fold: 2004 X3 3.0, 6MT, Black Sapphire on Terracotta, port, Premium, Cold Weather.