This is the 40 cell version on a garbage truck which had a number of mechanical issues including galloping when idling, smoky and very odorous exhaust, and fuel consumption at 0.9 GPH. Within 10 minutes of initial startup the engine leveled off at 700 RPM and did not fluctuate. Fuel consumption dropped to 0.6 GPH. Excessive vibration also ceased. We look forward to anticipation of the fuel consumption dropping to 0.4 GPH within 80 hours of operation.