New Liberty here. I know it's early. 600 miles, but I'm getting a solid
Depends on the type of city driving. Lots of start/stop is not going to get good MPG. Still though, I suspect your jeep isn't broken in yet.
You need to run it at various speeds and not at one constant RPM for quite a while. All slow-and-easy is doing is making it take longer to seat the rings and valves. Although modern engines are a bit quicker to break in, it still takes time for them to get better mileage.
Are you in New York City? Maybe your "Stop-And-Go" driving, at rush hour especially, is more "stop" than "go" and that destroys mileage. I had an old
225 Slant Six Valiant that got a solid 23-25 highway ... but during rush hour in Pueblo CO ... about 10.Budd
That Valiant was a nice little car.
Glad to report that now at about 1000 miles, I just got a whopping 21mph on the highway! Still sucks in the city.
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