Excessive gas consumption or just me?
I have a new to me 2010 Buick Lucerne CX 6 cylinder. It’s been taken care of very well it looks detailed even though it wasn’t. An elderly couple owned it before me and was traded in to a dealer where my friend from High school works. His aunt and uncle traded it in and he immediately contacted me since my budget was pretty low (4K) At first I thought I was crazy but it has a 18.5 gallon tank. I got gas one day ago I’ve driven 39.4 miles (mainly back roads, some highway) and somehow I’m a little above a quarter tank and fuel range of 223 miles. Average fuel economy is showing 22.2 mpg Granted I’ve driven cobalts civics and one Jeep up until now and I know there’s differences but I don’t ever recall getting this bad of gas mileage. I’m using regular 87 just had a synthetic oil change. Is this normal or could something be wrong? Also- after my oil change less than one week ago it says my oil life is 88% and there are no leaks. Something seems off. Thanks so much for any insight!