after reading your guy's results I kept better track of my mileage. the last tank of all in town driving I got 620km on 83L of fuel. its weird how with my cranked up injection pump I am getting better mileage, I do have 2.5" exhaust with only a resonator though. I also use a diesel additive with every tank. but it pays for itself, one bottle lasts me 4 fill ups and the bottle is only $8.00