I honestly don't think there is huge improvements in the 3800. A guy I know knows one of the OEM Calibrators and said that he tuned them very well factory, getting it dialed in very very well, so there isn't much room, at least on the 3800 timing to get much.

You can do trans tuning and such, but be careful with mixture, don't wanna get the spot light on you for that....

Quote Originally Posted by Slowrc View Post
Considering tuning for gas savings on an Impala 3800 2005 model. The vehicle does a lot of parking lot drivers training and idling.

How much could I save by tuning for mileage???

Thanks in advance guys!!!