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^probably too small to see with instrumentation. An antenna isn't a lot of "stuff" to cut through the air usually unless you've got a Jack head sitting on top. I still removed my antenna to remove that small sliver of drag and because I don't really listen to the radio (and when I do, I can still receive the stations normally)
just 4 things to remember about FE (that I've come to learn):
> driving style
> aerodynamics
> tires
> weight
address something from every area and you might do better FE in the long run. But as with all things, test and experiment first before you go all-in. If its a small impact you might not even notice without a tankful or two. Keep records of what you're doing and how you're doing them both with and without the modifications.
(basic control-vs-variable testing with repetition and minimized external influences)
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My 5 pillars of fuel efficiency:- driving style
- aerodynamics
- tires
- weight reduction
- engine maintenance
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