Here's an excerpt from a really interesting message I had from an older XFi owner. I invited him to participate, of course, but in case he doesn't show up, I don't think I'm breaching any privacy issues by omitting his name from this quote:
Quote:
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Many years ago, I experimented with a Model A Ford by removing two pistons and making sure that the valves on those cylinders would stay closed and not touched by the lifters. Gas mileage increased to 42 mpg, and the only big disadvantage was reduced speed on long uphill stretches of highway and slower acceleration.
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