Hi all, a newbie here so I hope I am posting in the right place.
I have a new Volvo S60 T5 FWD. It is drinking gasoline like a Lamborghini and the dealership isn't sure why (though they suggested break-in period. Is that a real thing? Does the fuel management software need a break-in? How does the engine know to snap out of its gasoline addiction in 1,000 miles? I don't see how this affects any of this).
Has anyone experienced this? I went through a whole tank for 150 miles. I am at 400 miles now and finishing my 2nd tank of gas. The app and the car show 13.9-14.2 MPG in city driving. I mostly use Eco mode and I know how to drive economically. On the highway, I average 15Mpg but went as far as 19Mpg. This is alarming. This car is supposed to give me TWICE as many miles for my gas. On the current 3rd tank I moved to economy 87 and I don't see a significant performance reduction -but the gas mileage is still the same.