Man all you rice lovin, GM haters out there. JK guys. The buick v-6 engines got a lot better as the years went on. Like I said, I had a '77 olds (Omega hatchback thank you) that had the 231ci engine in it. The factory mill was admittedly a slug, it was worn out, leaked coughed and wasn't anywhere near the rated 100hp. I swapped it out for an '83 buick v-6 with all the goodies. Holley single plane street dominator intake, Holley 400cfm 4-barrel, bored with high comps, ported and polished, oversize valves, a crane cam, dual coil valve springs, headers and plenty of other goodies. It ran like a dream and put a little over 250hp and 260ftlbs to the tires. The best part it could still put out 18mpg without effort. It got the same mpg as the original '77 engine and made better then double the power. Heck the standard 350 v-8 in a corvette couldn't do better than those numbers until the 1990's. I had fun with that car because that engine had a weird sound to it. It loped at idle and had a mean raspy note at high rpm. People would think you where sporting a worked small-block and you would pop the hood to show them a cute looking v-6.