You wont just notice an increase in gas mileage but also in the smoothness of the way the car runs and idles. Least I do anyway. It is a worthwhile investment on the car. It is part of my annual maintenance.
1998 BLK SVT CONTOUR
#2980 of 6535
395,000(ish) km (and counting)
SVTOA-TORONTO
Chapter Director
www.svtoa-toronto.ca