What tire pressures are you following. I inflate tires to 36 psi cold, and get a good balance of comfort and economy.I just put continental pure contact tires on my 2013 passat and I have lost about 5 MPG. The tires are eco rated and the psi is right. Has anyone else had this noticeable of a decrease in MPG with new tires?
They are around 38 psi, which is pretty high. I'm hoping its just a wear in period and it will get better.What tire pressures are you following. I inflate tires to 36 psi cold, and get a good balance of comfort and economy.
When you change tires, shop will follow placard on door and reduce PSI to match placard (or get it wrong all together and set to 30 psi)...
^^^This.Newer tires, if all else is equal, are heavier- and that weight is at the corners. New tires are taller, which decreases the reported mileage (reducing calculated FE). Newer tires have more rolling resistance than older tires, often even compared to non LRR tires. Meanwhile, "Old" tires, (especially ones that are well worn and about to be replaced) are often at their peak for higher observed FE. They are lighter, shorter, and have (generally) the lowest rolling resistance of their lifespan. This makes the swap to new tires more dramatic in observed FE. A search will reveal lots more good info.