I had a Cadillac 2000 STS Northstar that burned oil more than any other car I ever owned. Cadillac claimed that the oil needed for its high output needed it and as I bought it used in 2003 to use as a high mileage, high speed turnpike cruiser I found it to be true. I did figure that it would need a ring job from carbon (even with my 90 mph turnpike abuse) and I traded it after about 2 years. I left Atlanta for KC one time and never dropped below 90. I was a comfortable road car.
I would add a quart about every 1200 miles or worse.
I had a car once that I never changed the oil in!
It never stayed in long enough to get dirty.....................
lol i had a suburban once that burned oil like crazy- took it on a trip around the US- eventually totaled the vehicle- it needed work bad- but the accident proved it’s undoing- i don’t know how i didn’t burn that engine up- I’d pull into a station on the trip and have to put 2 quarts or more in several times on the trip- rode around with a smashed out back window for a month in the winter with it once- not good- had to keep the front windows down because the exhaust fumes woudl be too much to handle- that was back when i was tough and stupid though lol- (I did get enough $$ to fix it eventually- but it was a cob job, with plywood, plexiglass and roofing ice and snow shield as the hinge lol- but it worked-)