I owned a 2012 1LT v6 auto trans. Great car I put 100000 miles on it then traded it for a 2017 2SS A8. I never had a single issue with the v6, ran great, got good gas mileage. Never threw a code even with an Overkill tune in it.
One advantage with the I4 or the V6 is you don't have to be able to afford Y speed rated tires. Also the tire sizes are usually the same front and rear and can be rotated.
Now for the 6th gen LT1 V8 .. it ain't the same animal as the old LS engines. on road trips I get between 30 and 36 mpg. Around town I get between 20 and 24 mpg. and the big plus is it has 455hp when you want it. but it has very expensive tires that are not winter rated and can't be rotated. So mine will spend the winter in the garage under a car cover while I drive the Subaru in the snow...