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The summary table on p.12 is useful. Here are two takeaways for cars:
CLIMATE:
Summer (70°F or higher) Vs Winter (25°F) -- (0.75 mpg) 13%
Wind / Terrain (On any given trip) -- (0.75 mpg) 13%
FUEL:
#2D (API 35) Vs Winter Blend (API 38) -- (0.15 mpg) 2.5%
#2D (API 35) Vs Kerosene (API 48) -- (0.9 mpg) 15%
They also claim that LRR tires are less benefit over "normal" as they approach "wear-out" ... I wonder how they know that? No citations or discussions of tests.
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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.
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