How much of an impact is there on gas mileage , both carrying cargo and not?
155842
I only use it for carrying skis. There definitely is an impact on fuel mileage. We have a 2011 Sportwagen TDI. Our diesel mileage on the highway goes down about 1-2 MPG when the rack and skis are on the car.
155843
No observable impact on mileage; I remove it just the same, when finished with it. It's what you're carrying on it and at what speed that will affect your mileage!
155844
I would say unloaded the impact is negligible however the howl that they make will convince you to not have them on your car unloaded. If you have something like a couple of 2 x 4's strapped on top the effect on mileage is negligible. A car top carrier though will cause the mileage to be lower, but I don't have experience to be able to quantify the amount, maybe 5 to 10% would be an estimate. I can't help it but just have to say "your mileage may vary", depending on what you put up there.
155845
When the Thule is on top it doesn't effect gas milage much. If the rack is on the car without the Thule there is a whistling sound. But we attached the rack to the Thule and keep it all assembled either in the garage or on the car. We used it several times going from Florida to North Carolina and it works great on our Jetta sports Wagon
664756
Gas mileage didn't really change but it does seem to have more power. More in throttle response than anything.
821751
Not at all. If you're looking to increase gas mileage you will be disappointed. If you want power and sound, you'll love it.
758122
That would depend on the type and size of the cargo you intend to carry. I don't think there is a 'best.'
1871172
You may get 1 or 2 mpg better but its not a guarantee. Mostly depends on how you drive, how long and often you idle the truck and also fuel quality.
1942530
I have only seen slight improvement not mpg, maybe 3-4 mpg more. The big improvement comes from horse power and torque.
1086688
I went from 15 avg to about 17.5. I do tow a lot, so that included highway, city, and towing. My best road trip unloaded was 18.35. But I ran the transmission tune as well, and setting on HOT!! Great power when you need it! Running with DPF removed is a must to gain any real mileage.
1795454
My gas mileage definitely improved. More power and torque as wellI'm in canada so we measure in litres/100km. I went from 17-18 litres/100km down to 13-14 litres/100km. About 20-25% fuel savings. Biggest difference is in city driving and towing. They're are a lot of different models, make sure to get the right one for your tuck
90545
Although the mpg must be less, we did not notice that much of a difference going from CT to Maine and we had the bag packed to the max. I put the bag as far back on the roof possible and cinched it very tight.
1871176
I got about 1-2 mpg extra on the performance tune... with a gentle right foot. Heavy right foot... not so much of a gain!
1604422
It will reduce your gas mileage it does create wind noise especially over 50mph. I use it for hauling camping gear locally. Enclosed cargo boxes are great when they're new but the locking mechanisms tend to go bad and you can lose everything in it if it pops open while on the interstate, I knew somebody that it happened to, that's why I went with the rack.
1047852
On my 2004 Jeep Grand Cherokee V8. I only noticed trying to save gas mileage only got 1-2 MPG improvement. The shifting does great and really smooth. I have a K&N; intake and still no performance difference. Idling was a little smoother. I have not tried the high performance feature. Towing feature does great lots of torque. Hope this is helpful.
2183732
LisaI bought the tuner to go on a 2006 Chevy 3500 Express van. I pull a 30ft car trailer with it. I have had it for a month or two. I have seen a gas mileage improvement of 2 to 3 miles/gal. Which I drive long distances. It does improve the power and fuel economy. If you drive a lot a mile or two per gal is a great help.
1540958
I towed the recommended 1500lbs with no problems. XV Crosstrek. It actually rode better but Killed my otherwise excellent fuel economy.
1825957
I usually use it packed full, but have used it about 3/4 full before. I don't think it really matters. Our gas mileage gets hurt more from the extra weight, I think.
1160130
Its not crazy---- more for the torque... really imporved the torque... Gas... MAYBE 2 gallons. mile
2109255
Depends on how full the carrier is, how bumpy the road you are traveling is, and if you are doing any turns? I imagine if you have it filled below the bottle neck there shouldn't be much spillage.