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My average fuel economy 12k into ownership of my leftover 2017 Niro was 56 mpg. My driving habits and trips have not changed, but since immediately after my last oil change the mpg has dropped dramatically. I am now averaging 43 mpg and I have run through several tanks of fuel since this change.
Could the dealership have put the conventional oil in the engine (or perhaps the wrong grade of oil) to cause this? The temperature has dropped here in New England, but I purchased in March and it was by no means warm at that time.
Could the dealership have put the conventional oil in the engine (or perhaps the wrong grade of oil) to cause this? The temperature has dropped here in New England, but I purchased in March and it was by no means warm at that time.