There you have it;
the straight thru average is 138.75
which is sitting on the hi-end of ho-hum, and on the low end of modest.
However, the two 150s seem anomalous, they are 7.3% higher than the average and the 130 is 6.5% lower, for a spread of over 13%
My guess is that you started your test at #1, and ended at #8, and that your battery was slowing down. If true, then the picture may be better than it looks.
For me, having had 177 to 185 since 1999,
this pressure would be unacceptable.
The good news tho is that your engine should be happy with any old gas.