B Gas Plus

The Cummins Westport B Gas Plus engine is a six-cylinder lean burn spark-ignited natural gas vehicle engine that delivers from 195 to 230 hp with ultra-low emissions. It provides excellent torque, high fuel efficiency and reliable, robust performance.

Due to new emissions regulations effective in 2010, the B Gas Plus engine is no longer available in North America. 

For a brochure on the Euro B Gas Plus engine, click here.

Advertised Horsepower 195–230 hp 145–172 kW
Peak Torque 420–500 lb-ft 570–678 N•m
Governed Speed 2,800 rpm
Clutch Engagement Torque 285 lb-ft 386 N•m
Number of cylinders 6
Compression ratio 10:1
Oil System Capacity 4.0 U.S. gal 15 L
Coolant Capacity 10.5 U.S. qts 9.9 L
Net Weight w/ Std. Accessories, Dry 1,018 lbs 461 kg
Emissions Euro V / EEV
Fuel Types CNG / LNG / Biomethane
Methane number 65 or greater

Cummins Westport engines can accept a wide range of natural gas fuel compositions.
Use our Fuel Performance Specification Calculator to ensure compatibility.

Model Advertised Horsepower Peak Torque @ 1,600 rpm
BG-230 230 hp (172 kW) @ 2,800 rpm 500 lb-ft (678 N•m)
BG-200 200 hp (149 kW) @ 2,800 rpm 465 lb-ft (631 N•m)
BG-195 195 hp (145 kW) @ 2,800 rpm 420 lb-ft (570 N•m)

Overall, maintenance for the B Gas Plus is similar to that of diesel engines, but there are a few key differences:

  • Motor oil specifically formulated for natural gas engines is required. Do not use diesel engine oil in a natural gas engine.  If diesel engine oil is used, valve torching, piston scuffing and reduction in spark-plug life will occur.  For more information, see the links below or visit Cummins QuickServe Online:
  DISTANCE Hours Months
Oil and Filter* 6,000 mi (10,000 km) 250 3
Fuel Filter 24,000 mi (38,000 km) 1,000 12
Valve Adjustment 24,000 mi (38,000 km) 1,000 12
Spark Plugs (≥ 200hp) 24,000 mi (38,000 km) 1,000 12
Spark Plugs (≤ 195 hp) 36,000 mi (57,500 km) 1,500 18
Change Coolant 48,000 mi (77,000 km) 2,000 24
*Requires Natural Gas Engine Oil 
  • Default interval is the hours stated. Interval is whichever comes first – hours, miles or time.
  • Refer to Quick Serve Online or Owner's Manual for complete details on Maintenance Intervals.