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Originally Posted by oil pan 4
Well 10 years later and I don't think anything has changed.
The government mandated DPF garbage be installed on trucks and that lowers fuel milage.
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I don't think that is correct, oil pan. It would seem newer trucks have exceeded the initial mandate announced in 2011:
“From 2012 to 2017, we saw a lot better fuel economy year over year,” said Mike Roeth, executive director of the North American Council for Freight Efficiency. Overall, new trucks get are a third more fuel efficient than older ones, he said.
https://www.trucks.com/2019/07/15/fu...t-truck-sales/