So... in 2008 I replaced the original muffler with a cheap Speedy generic muffler. Fuel mileage actually went down when I changed it and it's due to be changed again, but I hesitate as the bigger the hole and louder the muffler gets, the less fuel I actually use. Right now I'm getting about 600km to a tank with E10 fuel on highway driving. The last fill-up said I got 12.9L/100km
Bottom line is that the muffler is getting quite loud now and really does need to be changed, but I don't want to change it for one that'll create too much back pressure reducing my fuel economy. I was thinking of possibly getting a Magnaflow, with maybe the dual out tail pipes.
Anyone have any suggestions of a muffler that'll not affect my gas mileage?
2000 Grand Cherokee Laredo.
4.7L V8
Thanks.
Bottom line is that the muffler is getting quite loud now and really does need to be changed, but I don't want to change it for one that'll create too much back pressure reducing my fuel economy. I was thinking of possibly getting a Magnaflow, with maybe the dual out tail pipes.
Anyone have any suggestions of a muffler that'll not affect my gas mileage?
2000 Grand Cherokee Laredo.
4.7L V8
Thanks.