Re Olds gas mileage..
Supprisingly, the early to mid 60s Olds got pretty good mileage for the day, I had a 63 Starfire and a 65 Ninety Eight LS, both would get around 18 on the highway, but I had a 70 98 LS that did good to get 12!The only problem with the 61-64 Ols is the miserable Slim Jim transmission, and if you dont hot rod it, its ok, but I was 16 when I had the 63 Starfire, and of course it stayed in the transmission shop, but boy would it GO!!tHAT 61 IS ONE OF MY ALL TIME FAVORITE OLDS, BEAUTIFUL! The worst gas mileage car we ever had was supprisingly a 66 Cutlass, 7 1/2 in town and no more than 10 on a trip! My Mother had it from 68-72, it was a great car, but THIRSTY!, her first cousin had a 66 Ninety Eight that consistently got 20 on a trip!..They kept it as there main car for about 30 years!