They used initial manufacturing emissions + electricity emissions. But they forgot to incorporate tire wear. Any car will need at least one or two sets of new tires in its lifetime - and those are an incredibly energy intensive recurring cost.

Not to mention the asphalt roads we drive them on! Though that cost is shared by all drivers, it has to be accounted for somewhere.

Even if we have a 100% electric vehicle fleet, we'd still need oil to make roads and tires. Plus the 88g from the study. Since EVs are being sold as a way to "solve climate change", this is a big problem. Most people assume a transition to EVs would mean stopping oil. They are wrong.