Check the timing first. Then check the egr ooperation. Then check the compression wet and dry. Run some engine cleaner through it.
All depends on the engine you have, the hemi has great acceleration.
Depends on what engine it has...
Depends on the engine and model
Depends on the engine, transmission, gearing, etc.
That all depended on the engine and rearend you had in the car.
It is important to have a well working car while on the road. The lack of fuel getting to the engine would cause hesitation on acceleration,
I seem to recall that Dodge recommends 89 Octane for that engine. I wouldn't go any lower than that due to the likelihood of pinging problems.
10-15
all depends on the engine in it and the rear end gearing.
Depends on the year, overall condition, options, mileage, etc...
Requires more information, what size is the engine and is it an automatic or manual transmission?
I get nine mpg on the road with mine.