By on August 4, 2017

 

gas pump

Duncan writes:

My daily driver is a 2013 Hyundai Genesis 5.0 R-Spec (with about 22,000 miles), making a claimed 429 hp on premium gas (91 octane, I assume). The power dips to 421 hp (claimed) when running on regular. Here in Iowa, we have the luxury of purchasing fuel with no ethanol.

The 87 octane gas w/o corn costs almost as much as 91 with. If it was your money, what would you put in the tank? 87 with no ethanol ($2.40ish a gallon), 87 with ethanol ($2.20ish) or 91 with ethanol ($2.50ish)? Running 87 or 91 without ethanol does improve mileage, whereas I do not notice an increase in performance running 91 or 93 — though it is recommended (but not required) by the good folks at Hyundai.

(Read More…)

Recent Comments

  • dukeisduke: @Professional Lurker Ironically, my mother-in-law (age 87 now) has gone the opposite direction. After...
  • 28-Cars-Later: I do wonder if its at the end of its product cycle, because if its not it makes me think something...
  • docoski: To the point about purpose of immunization: COVID-19 vaccines are designed to prevent severe disease. They...
  • the duke: Corey, I know you said no two door SUVs, no Nissan VQ V6, and no soft tops. But I’m going to recommend...
  • 28-Cars-Later: Winner.

New Car Research

Get a Free Dealer Quote

Who We Are

  • Adam Tonge
  • Bozi Tatarevic
  • Corey Lewis
  • Mark Baruth
  • Ronnie Schreiber