Just a plain multiviscosity oil will be fine as long as you change it every 3000 miles or 6 months along with the filter. I don't personally believe that the "high milage oils" are any better than the rest. I DO absolutely believe that regular lube, oil, and filter changes make a big difference.
Yes.
The EPA mileage estimate for the 2014 Jeep Cherokee is 22 mpg in the city, 31 mpg on the highway.
The EPA mileage estimate for the 2001 Jeep Cherokee is 16 mpg in the city, 21 mpg on the highway.
IF ITS GOT OVER 100,0000 MILES I WOULD TRY CASTROL SYNTHEIC. IT MADE FOR AUTOS THAT HAVE HIGH MILEAGE. IF ITS LOW MILEAGE GO WITH REGULAR CRASTROL 10-W-40...GOOD JEEPING
The EPA mileage estimate for the 2007 Jeep Grand-Cherokee is 15 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2002 Jeep Grand-Cherokee is 14 mpg in the city, 19 mpg on the highway.
The EPA mileage estimate for the 2014 Jeep Grand-Cherokee is 17 mpg in the city, 25 mpg on the highway.
The EPA mileage estimate for the 2001 Jeep Grand-Cherokee is 14 mpg in the city, 20 mpg on the highway.
The EPA mileage estimate for the 2006 Jeep Grand-Cherokee is 15 mpg in the city, 21 mpg on the highway.
The EPA mileage estimate for the 2013 Jeep Grand-Cherokee is 17 mpg in the city, 23 mpg on the highway.
The EPA mileage estimate for the 2011 Jeep Grand-Cherokee is 16 mpg in the city, 23 mpg on the highway.
The EPA mileage estimate for the 2008 Jeep Grand-Cherokee is 15 mpg in the city, 20 mpg on the highway.