Re: Sport Trac Rear Ratio
i get about 15 city and 17 hwy on a good day. If i put the bike in back it goes about 12 city and 15 hwy.
i thought a bigger gear ratio would cause worse gas because the engine is at a higher rpm just to go the same speed
Higher RPM's at a given speed don't factor into burning more fuel, throttle position does. The more you put your foot into it the more fuel you'll consume. If you drive in 3rd gear instead of over drive for a few days I'm sure you'll get similar mileage unless your commute is strictly all highway. There are a lot of variables involved when it comes to fuel economy. Again, the SportTrac isn't rated much above 18mpg in 2wd 4.0L V6 form as it's based on a truck platform. I don't mean to sound crude here, but one doesn't buy a truck for fuel economy, you buy it for purpose.
When was the last tune up done - ie. new plugs, air filter fuel pressure check etc? Routine maintenance can sometimes boost mileage. Depending on the weight of your bike, mileage will drop accordingly. If it weighs 400lbs, that'd be like adding a few passengers inside the vehicle. Depending what highway speed you drive at (below 65mph with any load will greatly increase mileage)
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!