I always had trouble drafting trucks for to long , I try but the speeds get to high and I drop off, sadly out of their wind break but I refuse to drive 70mph as it raises the rpm above my mpg comfort zone which is 2000rpm max at hwy speed.
I only go below the posted speed limit if its a double lane so the less economical can pass at will , I definitely avoid disrupting others on the road.
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Save gas
Ride a Mtn bike for errands exercise entertainment and outright fun
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