CTS-V2

Ok... so two different things... Anyone replaced the O2 sensor on the passenger side, before the cat? or both front ones? It looks like it a pain in the *** to get to without removing ****, any suggestions... the rear to are easy as ****...

Secondly, just changed my diff fluid and while under there I thought I might get some new shocks. Any suggestions? I don't take it to the track or anything, still have the original diff with 70k miles so trying not to ruin that. But the stock ones are decent, wouldn't mind a little stiffer.

Thanks guys!

CTS-V2

What does everyone get for MPGs? I have seen a range from 12-23 from people, I dont come close to 23 regardless hw or not. I get about 12-16 (16 is driving is really easy). This is my second V and the first was very similar.

tmonttt

iTrader: (10)

I get 16-17 driving around the city during cooler weather, and upwards of 27 when I get on the interstate and cruise around 70-75 MPH. I have longtubes so the front O2's are really easy to get too and can't comment on it with stock headers.

azn2dmax

iTrader: (33)

I get 16-18 around city and around 27 hwy going 70-75. See sig for mods.

FuzzyLog1c

iTrader: (4)

I get 10-12 mpg in the city and about 25 mpg at above 65 mph. I drive very aggressively. If I held off a little, I'd see another couple mpg.

BudRacing

iTrader: (3)

OP, What year is your V? Your username indicates you have a V2.

isis

iTrader: (1)

I get around 16-18 on my commute. 1/2 highway, 1/2 35mph country roads with stop signs and lights. Haven't done highway trips yet. 100% stock car so far.

CTS-V2

Its a 2005 ... my username is because it is my second v... my friends and I call V1 the one I totalled and my current one is V2... so not a new one, just my second!

Bacon

Front O2s are a pita. Best way to get them is to drop the catback and then get a long extension and a breaker bar and separate the cats from the stock manifolds from below. Bolts are fairly easy to get to, but will likely be heat welded together. Other option is to take the cat-back off and then to take the manifold/cat combo out as one.

Why do you need them out? Bad sensor? CEL?

CTS-V2

Ya, the front passenger side is throwing a code... so figured I would replace all four, but now might just do the one side...