Savana 3500 V8-4.8L (2009)
Support the GM Oil Life System, thereby minimizing the replacement of engine oil, before its life has been depleted.
Reduce the duplication of requirements for a large number of internal GM engine oil specifications.
International Lubricants Standardization and Approval Committee (ILSAC)
In addition to GM dexos 1(TM), a new International Lubricants Standardization and Approval Committee (ILSAC) standard called GF-5, was
introduced in October 2010.
There will be a corresponding API category, called: SN Resource Conserving. The current GF-4 standard was put in place in 2004 and will
become obsolete in October 2011. Similar to dexos 1(TM), the GF-5 standard will use a new fuel economy test, Sequence VID, which demands a
statistically significant increase in fuel economy versus the Sequence VIB test that was used for GF-4.
It is expected that all dexos 1(TM) approved oils will be capable of meeting the GF-5 standard. However, not all GF-5 engine oils will be capable
of meeting the dexos 1(TM) specification.
Like dexos(TM), the new ILSAC GF-5 standard will call for more sophisticated additives. The API will begin licensing marketers during October
2010, to produce and distribute GF-5 certified products, which are expected to include SAE 0W-20, 0W-30, 5W-20, 5W-30 and 10W-30 oils.
Corporate Average Fuel Economy (CAFE) Requirements Effect on Fuel Economy
Since CAFE standards were first introduced in 1974, the fuel economy of cars has more than doubled, while the fuel economy of light trucks has
increased by more than 50 percent. Proposed CAFE standards call for a continuation of increased fuel economy in new cars and trucks. To meet these
future requirements, all aspects of vehicle operation are being looked at more critically than ever before.
New technology being introduced in GM vehicles designed to increase vehicle efficiency and fuel economy include direct injection, cam phasing,
turbocharging and active fuel management (AFM). The demands of these new technologies on engine oil also are taken into consideration when
determining new oil specifications. AFM for example can help to achieve improved fuel economy. However alternately deactivating and activating the
cylinders by not allowing the intake and exhaust valves to open contributes to additional stress on the engine oil.
Another industry trend for meeting tough fuel economy mandates has been a shift toward lower viscosity oils.
dexos 1(TM) will eventually be offered in several viscosity grades in accordance with engine needs: SAE 0W-20, 5W-20, 0W-30 and 5W-30.
Using the right viscosity grade oil is critical for proper engine performance. Always refer to the Maintenance section of a vehicle Owner Manual for the
proper viscosity grade for the engine being serviced.
GM Oil Life System in Conjunction With dexos (TM) Supports Extended Oil Change Intervals
To help conserve oil while maintaining engine protection, many GM vehicles are equipped with the GM Oil Life System. This system can provide oil
change intervals that exceed the traditional 3,000 mile (4,830 km) recommendation.
The dexos (TM) specification, with its requirements for improved oil robustness, compliments the GM Oil Life System by supporting extended oil
change intervals over the lifetime of a vehicle.
If all GM customers with GM Oil Life System equipped vehicles would use the system as intended, GM estimates that more than 100 million gallons of
oil could be saved annually.
GM dexos 2(TM) Information Center Website
Refer to the following General Motors website for dexos 2(TM) information about the different licensed brands that are currently available:
GM dexos 2(TM) Engine Oil Trademark and Icons