Drop in CAI and better MPG
JK Freak
Joined: Mar 2008
Posts: 563
Likes: 1
From: Hopedale, MA
If you want to improve your MPG look no further than your right foot. I get about 16.5-17 on the interstate when going 73 mph. If I slow it down to 60 we get 20-21. If you have an auto it is harder to manage but watch how you accelerate. It takes way more fuel to turn bigger tires. If you're in a hurry and want this to happen quickly your MPG will suffer. It's a Jeep not a hot rod, so slow your roll 
Thread Starter
JK Newbie
Joined: Feb 2014
Posts: 34
Likes: 0
From: Carrollton, GA
If you want to improve your MPG look no further than your right foot. I get about 16.5-17 on the interstate when going 73 mph. If I slow it down to 60 we get 20-21. If you have an auto it is harder to manage but watch how you accelerate. It takes way more fuel to turn bigger tires. If you're in a hurry and want this to happen quickly your MPG will suffer. It's a Jeep not a hot rod, so slow your roll
JK Enthusiast
Joined: Jan 2014
Posts: 160
Likes: 0
If you want to improve your MPG look no further than your right foot. I get about 16.5-17 on the interstate when going 73 mph. If I slow it down to 60 we get 20-21. If you have an auto it is harder to manage but watch how you accelerate. It takes way more fuel to turn bigger tires. If you're in a hurry and want this to happen quickly your MPG will suffer. It's a Jeep not a hot rod, so slow your roll
JK Junkie
Joined: Jun 2013
Posts: 3,697
Likes: 2
From: Grosse Pointe, MI
He is also using low rolling resistance 40" tires. Not to mention, only going with a 13.5" wide tire (he cut no corners to maximize aerodynamics).
JK Jedi
Joined: Oct 2010
Posts: 6,222
Likes: 376
From: Southwest Reno, NV
Thread Starter
JK Newbie
Joined: Feb 2014
Posts: 34
Likes: 0
From: Carrollton, GA
JK Newbie
Joined: Feb 2014
Posts: 88
Likes: 0
From: Placentia,CA
Sounds boring....why not just have a Scion on something? LOL
JK Super Freak
Joined: Nov 2010
Posts: 1,186
Likes: 2
From: Vallejo, CA
Modding a jeep for gas mileage is like modding a Ferrari with a lift and big knobby tires for off road use. Wrong platform. Though Lamborghini did it once in the 90's. Besides, mileage is one reason for the new Renegade. Europe gets a diesel that does 100 kilometers with 4.5 liters. Isn't that 60 miles per gallon?
Last edited by BlackRockBurner; Mar 12, 2014 at 10:13 PM.
JK Freak
Joined: Jan 2012
Posts: 910
Likes: 1
From: chilliwack BC
Modding a jeep for gas mileage is like modding a Ferrari with a lift and big knobby tires for off road use. Wrong platform. Though Lamborghini did it once in the 90's. Besides, mileage is one reason for the new Renegade. Europe gets a diesel that does 100 kilometers with 4.5 liters. Isn't that 60 miles per gallon?
JK Jedi Master
Joined: Mar 2007
Posts: 14,800
Likes: 374
From: Midwest City, OK
As for CAIs (and any other device aftermarket manufacturers come up with): If there were any easy mileage increases, ALL of the U.S. vehicle manufacturers would be using it. It's driven by the Corporate Average Fuel Economy (CAFE) standards. That's why we have no V8 as an option in the Wrangler. Believe me: Chrysler would much rather sell higher profit margins V8s if they could meet the CAFE standards just by dropping a CAI in their fleet. There's no easy mileage out there. As previously suggested: Keep your speed down, avoid mods that add weight and increase drag. That's how you "improve" gas mileage.