The push for improved economy, comfort and performance can be seen in the latest vacuum truck chassis chosen for septic service. From hybrid fuel systems to air-ride seats and an endless variety of transmissions and suspensions, deciding on your next purchase can be a daunting task.With diesel prices holding above $4 a gallon, economy is on everyone’s mind these days. And although the industry average for many of these workhorses is an estimated 6 mpg, your mileage could be somewhat better — or worse — depending on how and where you drive and the options you choose.Do you climb steep
