He/Him
Sneaking all around the fediverse.
Also at:breakfastmtn@lemmy.cabreakfastmtm@mastodon.socialbreakfastmtn@pixelfed.social
He/Him
Sneaking all around the fediverse.
Also at:breakfastmtn@lemmy.cabreakfastmtm@mastodon.socialbreakfastmtn@pixelfed.social
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The issue isn't really that the estimate is wrong, it's that it's wrong by an enormous amount -- and one that's been increasing every year. I don't think that the study is trying to say that these vehicles are inefficient as some kind of absolute judgment, but that they're less efficient than estimated (although there are big differences based on vehicle make and model).
I don't think the problem really lies with manufacturers, it's that the current tests aren't accurate enough to predict real-world usage closely enough. Although, driver input is mediated by computer systems and if on-board systems are being too aggressive in switching over to ICE, I suppose that's a manufacturers problem.
Really, they've been doing these very large studies for a long time. The sample size is large enough to capture the full diversity of driving styles and it cannot be a few outliers skewing results. Since 2012, the disparity between estimated and observed fuel usage has grown every year. Why? Why is it changing and why is it always changing in the same direction?