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2014 Infiniti QX80 4WD — 5.6L 8-cyl, S7 automatic, 4WD
This 2014 Infiniti QX80 4WD (5.6L 8-cyl, S7 automatic, 4WD) takes premium gasoline. PREMIUM
16
MPG combined (14 city / 20 hwy)
$4,388
est. fuel cost / year (today’s prices, 15k mi)
564 g/mi
tailpipe CO₂
At today's AAA national average price ($4.68/gal, 2026-07-05) — the EPA's own price/date assumption isn't exposed in the public dataset, so we recompute this from the EPA's MPG figure and a sourced current price.
EPA updated its fuel-economy equations again for model year 2017 — mostly affecting hybrids and turbocharged engines — and recalculated 2011-2016 ratings to match, in some cases 1-2 MPG lower. The number above already reflects that update.
The EPA lists this trim as premium because that's the fuel the manufacturer specified for its mileage test. Many such engines will run on regular with slightly lower power and MPG — but check your owner's manual to see whether premium is required or just recommended.
EPA fuel type: Premium · class: Standard Sport Utility Vehicle 4WD · engine: 5.6L 8-cyl · transmission: S7 automatic · drive: 4WD · MPG retrieved 2026-07-24.