I grew up around the LA area and found that was common under a short interval but not for a long one. I had a diesel & sometimes tried to see how high I could k

I grew up around the LA area and found that was common under a short interval but not for a long one. I had a diesel & sometimes tried to see how high I could keep the mileage on a tank (record was 52mpg), and one thing I noticed was that the guys blowing by at 90 were just burning cash: they’d fly by but then stomp on the brakes due to traffic over and over again, while I was having a much less stressful time going the average speed and rarely even touching the brakes.