|The LPG system on the Alloytec V-6. Click to enlarge.|
In Australia, GM Holden has reduced the cost of Holden’s dual-fuel LPG system by $1,500: from $3,900 to $2,400 on Commodore Omega, Berlina and 60th Anniversary sedans; and from $4900 to $3400 for VE Omega ute (automatic model only). The Australian Federal Government offers a rebate of $2000 on such vehicles, and the state government of Western Australia offers an additional $1,000 subsidy.
Holden’s LPG unit is an advanced Sequential Vapour Gas Injection (SVGI) system, which injects gas directly into the engine, mimicking the gasoline injection sequence. It has automatic changeover to LPG via seamless cylinder-by-cylinder activation and provides an automatic change back to gasoline at low LPG levels.
Holden’s dual-fuel Alloytec V-6 engine is available on VE Omega, Berlina and 60th Anniversary sedan models, and the VE Omega ute. Holden’s LPG-powered sedans produce peak power of 175 kW (235 hp) @ 6000 rpm (gasoline 180 kW @ 6000 rpm) and peak torque is 325 Nm (240 lb-ft) @ 2600 rpm (gasoline 330 Nm @ 2600 rpm).
Dual-fuel Omega and Berlina sedan models running on LPG currently deliver fuel economy of 15.5 liters per 100km (15.2 mpg US) and 15.7 liters (15 mpg US) for Omega ute.
On the sedan, a 73 liter (19 gallons US) cylindrical LPG tank is located under the parcel shelf in the trunk. On the ute, a 74 liter cylindrical tank is fitted in the cargo tray with a modified tub liner. On both variants, the existing 73 liter gasoline tank is unchanged.
The dual fuel system has been designed and engineered by Holden; dual fuel models are covered by Holden’s three-year/100,100 km (62,200 miles) new vehicle warranty and are fully tested for safety and crash worthiness.
LPG and gasoline fillers are combined under the existing fuel filler cap and there is a separate LPG fuel gauge. There is no difference to service intervals and little difference to service costs, with an LPG vapor filter requiring replacement every 15,000 km (9,320 miles), and a liquid filter every 120,000 km (75,000 miles).