Unicorn tears
fdcg27 said:While dexos 1 was a step beyond API SN, it was only a small step.
Based on what I remember from Lubrizol performance charts, it was not a small step at all.
If you look at the numbers rather than a graphical depiction, the differences aren't all that great.
This is the reason that virtually any Grp III qualified for dexos 1.
Yes, you have to look at the numbers. The Lubrizol spider graphs/radar charts are NOT supposed to be comparable between standards. I.e., the graphic overlay is only valid when overlaying one API standard against another. They are not scaled to be accurate between, say, API vs. Dexos. There is a disclaimer to that effect somewhere on the page usually.
As to 10w-30, I'd be running it in any climate where I did not have to regularly start it in the single digits(F) or lower. Where I live, I run it year-round in all vehicles.