When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Does it actually improve fuel economy, or does it cause the car to over-calculate?
On the drive down this weekend I was averaging about 27 mpg at 74 and on the way back it was showing 31.
I guess I'll check it manually to verify.
Depends on year of car but yes the factory has them running a little rich.
97-2001 the car runs much better all around.
2002-2004 help's allot but not as much
We have seen a increase in gas mileage. The vettes change about 1-2 miles per gallon. Then trucks see about 3-4 miles per gallon, cruising not pulling.
Depends on year of car but yes the factory has them running a little rich.
97-2001 the car runs much better all around.
2002-2004 help's allot but not as much