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Cherokee V6 boosted by 1-2 mpg

by David Zatz on

start-stop system

The new stop-start system on Jeep Cherokee has helped to create a 1-2 mpg increase across the board. A Chrysler spokesman told Allpar, “While ESS itself doesn’t necessarily help with the highway fuel economy rating, some of the actions we did for continuous improvement and to enable ESS helped on the highway.”

EPA figures researched by “mentalicca” show that:

  • With front wheel drive, the V6 Cherokee rose from 19 city, 28 highway to 21 city, 29 highway, while combined mileage rose from 22 to 24 mpg.
  • With Active Drive I, the base AWD setup, EPA ratings rose by 1 mpg across the board.
  • With Active Drive II, city and highway mileage were unchanged at 19 and 26 mpg, but the combined rating rose from 21 to 22.
  • With Trailhawk models, the only Cherokees with steel skid plates to protect the underside of the car, mileage rose by 1 mpg city and highway, to 19 and 26, with combined ratings going from 20 to 22 mpg.  This might make the Trailhawk more attractive, since there is no fuel-mileage penalty on the price sticker.

Current price stickers emphasize the single combined mileage rating, which appears in large print.

In addition to helping fleet fuel economy ratings, which have been a minor problem for Chrysler as truck sales took off but car sales remained roughly stable, the higher mileage may help swing the balance to Cherokee for buyers who are on the fence. The new Jeep, with its nine-speed automatic, quiet interior, and sophisticated traction systems, has been attracting import buyers who tend to value fuel economy.

Similar systems are used on the Chrysler 200 four-cylinder and Ram 1500 HFE. The engine is restarted as soon as the driver takes their foot off the brake. Drivers can manually disable the system.

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