this post was submitted on 23 Oct 2023
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DOJ probing Tesla’s EV range after reports of exaggerated numbers | Tesla has allegedly been canceling service appointments from customers who are discovering their vehicles are not getting as much... (www.theverge.com)
submitted 1 year ago by L4s@lemmy.world to c/technology@lemmy.world
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DOJ probing Tesla’s EV range after reports of exaggerated numbers | Tesla has allegedly been canceling service appointments from customers who are discovering their vehicles are not getting as much...::Tesla disclosed that the Department of Justice is seeking information about the company’s vehicle range after reports alleged that the company was exaggerating its figures.

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[–] hddsx@lemmy.ca 5 points 1 year ago (1 children)

Wait what? The fuel efficiency is based on the 5 cycle fuel economy test, which includes a mix of highway and city driving. IIRC the figures from EPA/CARB are less rosy than EU/WLTP.

Tesla is definitely the odd one out here. Most manufacturers you can meet or exceed if you try hard enough. When you look at legislation, they say to use good engineering practice. Tesla arguably is not in this case.

I’m not sure if the the BEV/PEV regulations were solidified when Teslas first came to market, but they sure as hell are now.

[–] cosmic_slate@dmv.social 1 points 1 year ago (1 children)

Tesla isn’t the odd one out necessarily. Real world EV ranges are all over the place and are inconsistent based on who’s testing.

Compare these two for example:

https://www.caranddriver.com/features/a44676201/ev-range-epa-vs-real-world-tested/

https://www.edmunds.com/car-news/electric-car-range-and-consumption-epa-vs-edmunds.html

The EPA test for EVs is absolutely terrible to gauge performance at normal highway speeds (70mph+).

[–] hddsx@lemmy.ca 1 points 1 year ago (1 children)

As much as I like car and driver, that article is absolute dog shit. The edmunds article is interesting though.

I bet your gripe isn't with the EPA, but with SAE. I may be wrong, but if I recall correctly SAE uses EPA tests to define J1634 and allows manufacturers to either run an SCT or an MCT. EPA then adopts that into legislation. I believe EU/WLTP also uses J1634 but substitutes the EPA test cycles with the appropriate WLTC cycle (usually 3b for vehicles you would find in the US).

[–] cosmic_slate@dmv.social 1 points 1 year ago

Thank you for explaining how this standard more-or-less came to be! I wasn't aware that the SAE was involved in helping develop it.