Cadillac STS Forum - 2005 through 2012 Discussion, 08 STS V6 with 149,000 km: what problems to expect in Past Cadillac Vehicle Discussion; Hi, I'm thinking of buying the above-referenced vehicle from a Caddy dealer, along with an extended powertrain warranty.
I'll be ...
Re: 08 STS V6 with 149,000 km: what problems to expect
The 2005 & up Northstar is significantly improved over the earlier design and has few issues. It doesn't even use much more gas than the V6 because the biggest single factor is the weight of the STS. The V8 is significantly faster since even the DI V6 still doesn't come close to the torque output of the Northstar.
In my opinion, too many members report serious issues with the 3.6 V6 for it to receive equal consideration even if its greater effeciency were attractive. ACC is only available on V8-equipped STS; for me that's game-over.