* Year and Model of Wrangler: Different years have different engines and transmissions, significantly impacting fuel economy.
* Engine Size: A 4-cylinder Wrangler will get better MPG than a V6.
* Transmission: Automatic or manual transmissions also affect MPG.
* Driving Style: Aggressive driving significantly reduces fuel economy.
* Terrain: Off-roading drastically reduces MPG compared to highway driving.
* Tire Type: While 35" tires are a factor, the specific tire's rolling resistance also plays a role. A more aggressive off-road tire will reduce MPG more than a more street-oriented tire.
* Modifications: Other modifications (lift kits, heavier bumpers, etc.) also affect fuel economy.
The impact of 35" tires: Larger, heavier 35" tires *always* reduce MPG compared to the stock tire size. You can expect a noticeable decrease, perhaps 2-4 MPG or more, depending on the other factors listed above.
To get an estimate: You would need to:
1. Find the MPG rating for the specific year, model, and engine of the Wrangler with its *stock* tire size. This information is usually found in the owner's manual or online resources like the EPA's fueleconomy.gov website.
2. Subtract 2-4 MPG (or more) as a rough estimate of the decrease caused by the 35" tires. Keep in mind that this is just a general guess; the actual decrease could be more or less.
In short, you can't get a precise MPG per gas tank without more specific information about the Wrangler and driving conditions. Finding the stock MPG and then estimating a reduction due to larger tires is the best approach.
