I also think these dyno “highway speed” tests don’t prove jack squat about oil performance except showing the reliability of the ENGINE actually holding up for X amount of miles.
They aren’t doing anything Severe in these tests AT ALL.
**Highway cruising is the easiest on engines & oil.
**Doing 10k oil changes as per the manufacturers recommended maintenance schedule (any average Joe Schmo synthetic can do that) isn’t anything special.
**dyno cruising in controlled Lab environment isn’t stressing anything.
**no cold starts.
I can keep going.
now when they do actual real world tests with taxi’s and stuff, it’s at least somewhat realistic but again... no cold starts.