Originally Posted By: Hounds
Originally Posted By: CATERHAM
That's certainly one possibility. Another interpretation of the same facts is that Honda's compulsive/obsessive engineers spent two years testing COP's 0W-20 and determined that Idemitsu's product, whatever its formulation or cost, provided no discernible advantages for the consumer.
I'd be willng to bet a large sum that Honda's engineers in Japan have not even seen COP's 0W-20. But I would agree that American Honda likely concluded that COP 0W-20's lower VI 0W-20 and lower moly level would provide no noticeable advantage for the Honda buyer. Even a 2% fuel economy difference which would be subtantial would be almost impossible for the consumer to discern.
The main lubricant supplier to Honda Canada is Petro-Canada but Idemitsu USA still supplies some specific oils that PC doesn't supply or that meet Honda's requirements. Interestingly enough that includes the 0W-20 grade although PC make a fine 170 VI 0W-20 that they would be more than happy to supply to Honda and Acura. But a couple years ago fellow BITOG member, rcy, found out from a PC engineer that their 0W-20 oil didn't meet Honda Canada's requirements for an "ultra low viscosity oil". As a result Honda Canada continues to import from Jeffersonville Illinois in 1 litre bottles and 205 litre drums the Idemitsu made 0W-20 packaged under the Honda and Acura label.
American Honda and Honda Canada are independant companies that can choose whatever oil suppliers they want for their dealers.
Toyota USA and Toyota Canada have taken a more consistent approach in keeping with Toyota's lubrication policy. Nippon Oil of Alabama used to supply all of NA with the Toyota Brand 0W-20. When Toyota changed suppliers to EOM they didn't use Mobil's existing 0W-20 but formulated a new oil to meet Toyota's requirements; an oil virtually identical to the original Nippon Oil made product. In fact they even import from Japan the moly additive that's used in such high doses.