Fuel Consumption: Speed: Delta Fuel: Delta Speed: %change fuel: % change speed: %delta fuel/% delta speed:
2.823 45 2.823 45 100% 100% 1.000
3.789 55 0.966 10 34% 22% 1.540
4.999 65 1.21 10 24% 18% 1.331
6.652 75 1.653 10 25% 15% 1.615
This looks like your sweet spot is closer to 65 mph.
Here is some more relevant information for driving in traffic:
Driving in traffic.
Right on the money. I’ve now done two trips from New York City to DC. Slowing down significantly and using cruise control the entire way changed my half tank range from 165 miles to 220 miles. For a Wrangler, that’s nothing short of phenomenal, nearly 25mpg as compared to the previous 18mpg.
It really doesn’t impact on other drivers either. For the most part, 65mph is the speed limit on I-95 anyway and there are enough lanes for all the speeders to not even notice me. What I found really interesting is that when I slowed down, several other cars did as well – falling in line behind me for miles. Maybe they were just looking for an excuse to drive slow without looking ‘weak’ on the highway.
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