Oh man how do you do that? I pass almost everyone if I CHOOSE to haha. I get cut off by a lot of jerks everyday and I am going the speed limit, maybe a bit over.
I drove lot of underpowered cars in my life and having technical gift that forced me to use head for driving, not just a foot.
With 21 HP Fiat 126 it took about 2 minutes to speed from 50 to 60 mph (the good model would reach 60) so when I was planning to pass slow vehicle on 2-line highway with opposite traffic, I was making space between the car I wanted to pass and was observing the opposite traffic. When I saw a gap behind vehicle about 1/2 mile from us, I started accelerating.
So when the opposite car finally was behind us and there was a gap, I was already short distance behind the car I was going to pass with speed already 10-15 mph higher.
With such a technique I did not need acceleration for passing.
Coming back to driving VW in CA, the Jetta had about the same power to weigh ratio what 5-cylinder W124 does. Meaning on Grapevine grade I had to keep the gas pedal firmly on the floor to keep the 75-80 mph. One time when starting the climb on 4-lines freeway a Charger was kind of racing with me. He had V8 so he could accelerate, I could not.
But he got stuck on left lane behind slower vehicle, while I blow all that traffic using truck lane.
Your car require almost double fueling up, comparing to my diesel. So when on 600 miles trip you will save 1/2 hr with better acceleration (almost impossible) you will loose that advantage at gas station.