H.C.C.I. + hybrid technology = gasoline hybrid perfection?

An H.C.C.I. hybrid - as efficient as a diesel hybrid?

GM hasn't been the biggest fan of clean diesel technology.

O.K., not long ago, GM wasn't much of a fan of hybrid technology either, but that has changed. So, it isn't necessarily surprising that GM might not rush into clean diesel, right?

Or, maybe was there an alternative reason that GM hasn't been going diesel crazy?

If there is a reason, it might be the Homogenous-Charge Compression-Ignition engine, or H.C.C.I. --- Finish: H.C.C.I. + hybrid technology = Gasoline Hybrid Perfection