Repsol is the spanish company that bought YPF in Argentina. I don't know what Resol stands for, but YPF is Yacimientos Petroliferos Fiscales (it was the Argentine government oil company until about 8 years ago). They probably have the tecnology to produces decent stuff, but everything they sell here is junk. Most of the gear oils they sell here are GL-1, motor oils SC/CC or SD or CD. Their Low Ash Gas Engine oil shows twice the wear in half the time (compared with Chevron). They tell people they are testing some Group II oils, but I don't know for sure or for what applications. It's always possible that they have a good product out there somewhere, just doesn't make it to this market. Maybe the synthetic is made in Europe. I've never seen it. The Argentine company does not have an API license.