[91794]

No, you are not doing heavy-duty driving should not follow the 'HD/severe schedule maintenance'.

Follow normal maintenance schedule.

Driving lots of miles on pavement is neither "heavy duty" nor "severe" and does not require anything but normal maintenance.

If you drive exclusively on unpaved roads, that is probably an example of "heavy duty" which might require different maintenance than normal. The things that determine HD/severe-schedule maintenance are listed in the owners manual.

 

[91794]

Fwiw...

My 2016 sonic with the 1.4T has only used 87 octane, about 30k miles so far... No issues.

From 1984 until today, my GM V8 cars get better flat-highway-cruising mpg with 87 octane than with 91, up to 10% better - with either E0 or E10 gas.

The V8s have way too much torque to use in winter no matter the octane.

For mountain highway driving in warmer temperatures, the extra pep from 89 or 91+ is very nice if one drives a vehicle that can provide it.