Cadillac's are a pretty good car, but expensive to fix when items start
going belly up. I've heard that the fuel economy is not that bad...but
you have to remember that you have a 275-300 hp engine in those
A 1999 or 2000my Seville is going to have the 4.6l Northstar. There are 2
variants of this engine, the STS having the VIN 9 engine, and hence 25
horsepower advantage over the 275 horse Y engine. Both formidable
Very nice cars, I work on them daily for mostly maintenance service.
However, be advised that there are oil consumption issues with these
engines, as well as cold knock issues. Both are related to piston and
piston ring concerns, and there are NEW design pistons and rings available
to make these problems go away. If the cars that you have been looking at
are still under factory warranty, pay close attention to these two issues,
and have your dealer put the pistons and rings in if you have a legitimate
problem. GM guideline for oil consumption is one quart in 2000 miles.
That may seem like a lot of burning oil, but all of the Northstars burn oil,
and always have. It is a byproduct of a 300hp engine that gets 28 mpg
highway. You have to sacrifice somewhere.
Aside from this particular engine issue, there aren't many other things that
fail regularly on these. Enjoy your new car.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.