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Not safe or legal....
Not that this would be safe or legal, but has anyone tried running four space saver spares? I'd think a 155-series tire or whatever they are combined with 60+psi ought to show a significant increase in mileage.
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1989 Dodge Diesel 972rwhp, 27mpg.
1971 Nova tubbed, solid cam 355 w/nitrous, 8mpg (sorry).
1960 Nash DIY Hybrid Project
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