2004-2007 Cadillac CTS-V General Discussion Discussion, CTS-V Fuel Mileage in Cadillac CTS-V Series Forum - 2004 - 2007; Im impressed to say the least. I went on a 800 mile 1 way 1600 round trip ride with my ...
Im impressed to say the least. I went on a 800 mile 1 way 1600 round trip ride with my friend in his 2006 cadoo cts-v. At 70 mph the car said it was averaging 27mpg. when we whipped out the calculator and figured it out on our own per the gallons we pumped in between stops, it was actually 27.6. All that Hp and tq and fuel economy to boot. That was impressive to me considering they claim 25 highway!
Just back from Las Vegas. Round trip of 2600 miles. Running about 80 mph I was getting 24+ mpg. Lowest I got on highway was 21+ against headwind. Of course in Las Vegas I got hung up in traffic and was down to 15mpg. I remember my then new 1973 Vega (yes I bought one) would get about the same mileage but at slower speeds. They don't build them like they used to, and I am very thankful for that!
I noticed also that the computer is under rating MPG on long hauls over one tank. One hour trips it is over rating by 1 mpg.
Get someone to program your pcm or do it yourself with hptuners like I did and few others and it is good for 2-3 mpg. I got 30 mpg at the speed limit from Ohio to Philly during labor day weekend. I'll be making trip again this holidays season at higher speeds for comparison.
you know, I dont know why I call it CARB fuel. It isnt really, unless you are in California.
The clean air act, in it's current iteration, was enacted in 1990. It includes extra fuel additives (like ethanol) which promote cleaner burning, and fewer emissions, but reduce combustion efficiency, lowering mileage and horsepower. I believe every major metropolitan market has it now. Out in the boonies, where smog is not a problem, they don't have to use it. Hence, the gas is cheaper, and you get better mileage and more power.
Actually, if all 50 states could get together and decide on one single formula of gas, we could probably save alot of money on gas. As it stands now, there is somewhere north of 100 different formulas being used in the US right now.
Round-trip Bethlehem, PA to Cape Cod (710 miles total). Door to door to and from Bethlehem, including side trips and delays coming and going on the George Washington bridge, cruise control at 70 MPH and air conditioner on at all times (trip was in August) - Average MPG was 23.3. I remember when I was a kid that the VW bugs maybe averaged 20 MPG and everyone thought that was awesome!
In our case with the "V", on the highway your best friend is 6th gear as soon as possible.
Northern Michigan (we call "hilly" but some of you might go ) going to see in-laws in Mackinaw City, got 26.2 MPG at constant 70 MPH with very slight (~3 MPH) mostly tailwind, 75 degrees in August, AC on, for 150 miles. BTW, this was when I was bone stock.