Northstar Engines and System Technical Discussion Discussion, Pre 2000 Northstars in Cadillac Engine Technical Discussion; I was looking through the classifieds and someone made the remark in their add to beware the pre 2000 Northstars. ...
Automobile(s): None now...1972 Challenger=my pride and joy.
Sonoma Co, CA
Re: Pre 2000 Northstars
'94 STS, 120K, the piss is driven out of it daily, and it works great...ran 92 and 93 octane for a while, but 87 works beautifully with not a problem...when I was in Wyoming and Kansas not too long ago, I went with the "mid" grade, which was 87, because they had 83 and 85 as their cheapest and though that might be pushing it a bit. Stick with the 87.
The warning may be more in conjunction with the coolant system/headgasket issue which was more prevalent in the first gen N*s 92-95? which has been beat to death as an issue/problem on the boards, look around and you'll find more info.