Originally Posted By: Quattro Pete
AFAIK, most of the 229.51 approved oils are a combination of group III and other oil bases. Individual components mean little. It's the final product that matters, and as long as it meets the spec, you're good to go.
I agree with this.
Though Pentosin Super Pento III is true synthetic. I can get that one locally, but I still go with M1 ESP which is combination of Group III, IV and V. For me in this case, pour point is very important as well as flash point, and M1 ESP 5W30 is very good in both.