Castrol became the second major lubricants manufacturer to politely decline joining GM’s dexos license program. According to Jobbers World, Castrol will make products meeting dexos (namely Edge and Syntec products) but it will not participate in the licensing program. That leaves Shell as the only one of the “big four” companies to have joined the dexos program, with ExxonMobil still undecided. (I’d wager ExMo will eventually, if reluctantly, join the dexos license program, namely to keep their contracts with GM intact; Mobil 1 is, after all, factory fill in all Cadillacs, Corvettes and a few other GM models.)
It’ll be interesting to see what some of the smaller lubricants companies like ConocoPhillips and CITGO do now that at least two majors have dug in their heels regarding dexos. Plus, it will be interesting to see GM’s reaction, especially in light of continued OEM assaults on Magunson-Moss Warranty Act provisions (i.e. Honda’s “refusal” to warranty non-OEM parts on 2011 models).