I had a set of the Michelin LTX's on the S10 I used to have. I didn't buy them for FE-related reasons, but they were excellent tires (plenty of grip, not noisy, not over-aggressive tread), and definitely were not a detriment to my FE, as I maintained a consistent 30mpg hwy/25 city. As an added bonus, they were pretty good in snow-- anything that benefits winter traction in a 2WD truck is a big help.
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