The new GF-5 is already looking not to be a very good choice for doing extended oil change intervals which goes against the direction the industry is headed.
The new Dexos is making the GF-5 seem absolete already.....at least in the realm of extended oil change intervals.
...QUOTE....
<<<<<<GM plans to phase out any mention of ILSAC or API specifications in its owners manuals, in order to promote the new dexos specification. A mockup of an owners manual Johnson showed includes the warning: “Failure to use the recommended oil can result in engine damage not covered by the vehicle warranty.”
Impact on the Lube Industry
The initiatives being undertaken by both automakers will have a lasting impact on the fast lube industry. Ford’s reliance on smaller, harder-working turbocharged engines will put even more pressure on motor oil, possibly limiting the ability of even the next-generation GF-5 motor oil to offer oil change intervals that are much extended beyond today’s standards.
GM, meanwhile, will shortly introduce a proprietary (probably synthetic) motor oil that will allow its engines to maximize technologies like displacement on demand and variable valve technology. >>>>>>
Apparently, the automakers have not been very satisfied with the quality of the present day lubes and all the issues it has caused in their engines.
This indicates that the automakers have lost faith and confidence with the API standards set by big oil, and now are going to take matters into their own hands as did the Europeans to finally raise the lube standards where they actually need to be with todays high tech engines.