Too high a gear will lug the engine and reduce mileage. Or you can do like me and just drive faster. I think 3.70 is a bit too low for optimum mileage and 3.00 or 3.25 would help quite a bit. It also depends on the tranny. If you have a close ratio 2.32 low Toploader first gear the 3.00's aren't going to impress the beach bunny when she says "I like guys that can peel out".
Better use 4.56's and just drive on the shoulder with the four ways on!
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