I regularly get 18 or 19 no problem. Even brush up against 20 occasionally. Fla. is FLAT. I think the engine is comming into its sweet spot. Usually, around 30 or 40,000 mi.,an engine makes a bit more power, and runs a bit more efficiently. I may be just getting there now. I did a 175 mi. turn today, same sort of conditions...Fill at start,fill at end...same type two lanes, and speeds...21.2.
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That's pretty good mileage!!
