I have to tell you I think it all depends on brand. Up here I normally use Shell gas. I was at the dealership and had my exhaust manifolds replaced and had to fill us using Petro Canada which is really the only brand up here that advertise winter gas.
I had been getting 12.5 MPG and 490 km per tank. Now with 2 new exhast manifolds, cats and such I would think that I would be getting much better than the current 420 when the light came on. On Shell I was getting an honest 450-460 before the light was coming on. I have not adjusted my driving at all.
Tomorrow I have to fill up and will use Shell. I'll see what happens and hopefully get better mileage with Shell than with the Petro Can stuff/
I had been getting 12.5 MPG and 490 km per tank. Now with 2 new exhast manifolds, cats and such I would think that I would be getting much better than the current 420 when the light came on. On Shell I was getting an honest 450-460 before the light was coming on. I have not adjusted my driving at all.
Tomorrow I have to fill up and will use Shell. I'll see what happens and hopefully get better mileage with Shell than with the Petro Can stuff/