From this week's Lube Report
2nd generation of Dexos 1&2 is coming hopefully in 2015, which is almost 2 years ahead of GF-6.
The article does a good job explaining what dexos really is:
Quote:
Goals of the Dexos program are first to have a global common engine oil specification for factory and service fill, said Johnson. Other key goals include fuel economy improvements, engine oil robustness improvements, more catalyst-friendly fluids, and hardware-enabling engine oils that control aeration.
With engine life monitors now in more than 90 percent of GM vehicles, GM requires oils that compliment the oil life monitoring system and give customers lower cost of ownership and improved satisfaction through optimized drain intervals.
and this interesting snippet about the new Sequence VI-E fuel economy test and the use of a fuel additive:
Quote:
The Sequence VIE fuel economy test, he said, has shown exhaust valve leakage at some labs due to deposit build-up. The build-up can be eliminated using a top-tier fuel additive, which is now being used in the test. Test duration has increased from 155 hours to 200 hours.
I have seen many cases where using fuel additives/top tier fuel can contribute to the OCI length and show up UOA results. Just something those of us who are running out the OCI to a maximum possible range might want to consider.
2nd generation of Dexos 1&2 is coming hopefully in 2015, which is almost 2 years ahead of GF-6.
The article does a good job explaining what dexos really is:
Quote:
Goals of the Dexos program are first to have a global common engine oil specification for factory and service fill, said Johnson. Other key goals include fuel economy improvements, engine oil robustness improvements, more catalyst-friendly fluids, and hardware-enabling engine oils that control aeration.
With engine life monitors now in more than 90 percent of GM vehicles, GM requires oils that compliment the oil life monitoring system and give customers lower cost of ownership and improved satisfaction through optimized drain intervals.
and this interesting snippet about the new Sequence VI-E fuel economy test and the use of a fuel additive:
Quote:
The Sequence VIE fuel economy test, he said, has shown exhaust valve leakage at some labs due to deposit build-up. The build-up can be eliminated using a top-tier fuel additive, which is now being used in the test. Test duration has increased from 155 hours to 200 hours.
I have seen many cases where using fuel additives/top tier fuel can contribute to the OCI length and show up UOA results. Just something those of us who are running out the OCI to a maximum possible range might want to consider.