As it rushes to meet its pledge for “100 percent” of trips in electric vehicles by 2030, Uber is offering grants of $4,000 for drivers to swap their gas-guzzlers for zero-tailpipe emission vehicles.

EV owners love their cars, but gas owners remain deeply skeptical. Electric vehicles remain a polarizing subject, with current EV owners overwhelmingly likely to buy another one, while non-EV owners ...