I have the 4.6 liter Northstar in a 99 Deville. It is a fantastic engine. Strong as John the Bear, quiet, 27 mpg, 10.6:1 compression ratio, all aluminum, Double overhead cams, 4 valves/ cylinder, 275 Hp. Runs on regular gas. Runs even stronger on premium. It is about 40 years ahead of Chrysler's hemi. Put your foot into it and you are well above the speed limit in no time at all. Passing campers on a two lane road is down right fun. Northstar in one of things that makes my black Deville cool. My next Caddy will have the Northstar.