I did it in my 07 TL Type S and it was no problem. In fact, didn't some of the CTS's not come with a spare but came with a similar type fix a flat from the factory? I seem to remember seeing that.
I have not heard that it causes damage to tires, but I have heard that mechanics get pissed if you don't tell them you used it when you change the tire.
No. These do not work.Originally Posted by 00 ss
Do you think Cadillac/GM would NOT put a $10 part into their cars that would make them more appealing to consumers via better mpg?
And an aftermarket CAI MIGHT give .5 mpg increase at most
yeah i can deff do that, the car is in the shop right now getting a paint job but I should have it back tomorrow.
Previous best for the same route, 18.2 (city/suburban).
During this tank of gas a 40 mile interstate 70mph run bumped it to 22.2 without resetting. Afterwards several 10 minute local trips dropped it to 20. Now it's back to 21.2. I didn't think to track how many miles I put on and I'm driving lightly. I'll reset and take a long interstate run shortly although I don't have a base to compare.
I averaged 20mpg on my last tank and it was strictly city miles. just driving to and from work stop and go type traffic.
Getting 22 to 24 MPG out of old OBD-1 Northstar power
Bummer to read the latest greatest is not doing better.
Maybe you could get the computer programed to economy?
Dear Leader says:
I just completed a 2200 mile road trip. The best single tank mileage I got was 25.7 mpg over 320 miles from Flagstaff to Albuquerque. If you've ever made that run, you know it's mostly down hill. If it weren't for the wind, it might have been better. Overall average for the trip was right at 24 mpg. Some qualifier to these numbers, I had the cruise control set at 83-84 mph for most of the trip, gotta love 75 mph speed limits and I had the trunk full of luggage and my wife and both kids in the car. I may have been able to get above 25 mpg on the overall average if I had been going slower.
I still 100% stock.
FYI, I just picked up my 09 awd di premium and do nothing but highway miles every day. average about 200-250 miles a day. I will get at least 26-27mpg @ 72mph on cruise all day long here in Illinois and Wisconsin and I noticed 1-2 less with the air conditioning on. Its been about 5 tanks worth so far, and I'm ok with these results....
When i first installed it, I thought that I noticed a difference right away in running but wasn't positive. I now realize what that was. I recently installed the rest of the package (the cai) and notice the normal dead spots are back that had disappeared with the spacer alone. Suprisingly my mileage didn't further increase with the cai. It's possible that I'm driving differently now because of the sound of the cai. I was worried it would sound like the WAH sound of old 4 barrell carbs but instead has a great performance sound that doesn't start until 3000 rpm.
Last edited by jimtreber; 07-16-12 at 01:55 AM. Reason: clearify on the spacer