|
What tire pressure are you using? For a weighty car such as the Regal, inflating to sidewall max will decrease ride quality, but since you are on the highway quite a bit and the Regal has plenty of ride quality to spare, going up to 44 psi may not be noticeable, except at the pumps. Some good quality tires allow up to 51 psi as well.
What condition is your oil? If it's not been changed since Moses part the Red Sea, newer oil will help. Blocking the grill is another invisible mod that can help with the aerodynamics, and just making sure the OEM underskirting is in good shape can help. Many of the GM products have an air deflector roughly below the radiator that can be damaged over time; checking on its repair is likely to pay for itself rather easily.
As far as whether to allow the downshift, keeping it in top gear is likely to be much better, the 3.8 is crazy for low revving torque. Take advantage of it by staying in locked up torque convertor.
__________________
 RIP Maxima 1997-2012
Quote:
Originally Posted by jamesqf
I think you missed the point I was trying to make, which is that it's not rational to do either speed or fuel economy mods for economic reasons. You do it as a form of recreation, for the fun and for the challenge.
|
|