I have about 5,000 miles on the Conti DWS and am happy with them.
They cost 198/188 F/R, stock size front and rear is the size you're talking about here, 235.50.18 since they don't make a 225.50.18. Yet.
Total was $919 installed with lifetime balance at the local Discount Tire.

First click

My GP will just go one click after filling. It's not much. I do it for consistency in calculating MPG. And for getting all I can in it.
The KIA will take another gallon or so, at 30+ MPG that's a real difference.

I recently rented a Charger SXT 3.5. I filled up, took a 40 mile trip ...

I know people who spray the undercarriage (minus hot parts) with used motor oil or some other oily stuff.

Welcome, Dutch! I'm new here myself.

Welcome!!

Yeah more than most of the time the 3.05 was part of the Grand Touring package, and it does make a difference..

The diff can be changed, but you may need a different passenger side Axle, I am not 100%, not sure if the axles are the same for both 2.85 and 3.05

You would also need your PCM ...

No, I am looking at a potential vehicle. It appears the only last-gen LeSabre that had 3.05 are those equipped with Gran Touring package. Those are pretty rare.
From what I've read, the 3.05 makes a significant difference in acceleration.

So is it major surgery to swap the LeSabre final drive from 2.81 (IIRC) to 3.05?
Thanking all,

Nice. Made me want to play The Star Spangled Banner.

Need to get a few privates out there with some sandpaper and steel wool, scrub out that rust on the gun.

Which 18" GXP rims, Bonneville or Grand Prix. 18x8 and 235/50R18 are not a good match in my mind, but if your talking 18x7 then they are a good fit. I have Grand Prix 18x8 on my 01 Bonneville, with no problems. See post http://pontiacbonnevilleclub.com/forum/viewtopic.php?f=9&t=19733

Hope this ...

Yep, a wealth of good info in this thread. Thanks all.

Will the 18" GXP wheels fit non-GXP and LeSabre wheelwells? I'm thinking the 235x50x18 tires. Thanks, all.

Howdy all. I have a GP, and was looking around for G body information and found you. Nice site.
I was looking for LeSabre info, this looks like I could find good general info here.