Infiniti Q45 MPG by year — every rating on record

The Infiniti Q45 has a combined EPA fuel economy rating for 17 model years, from 1990 to 2006. Across those years its best rated version returned 18 mpg (1997) and its thirstiest returned 17 mpg (1990). The EPA record holds 17 configurations for this nameplate, most recently a Midsize Cars.

Year-by-year EPA ratings

Where it has stood in its class

Ranked against every other nameplate the EPA filed under the same class that year. The Infiniti Q45 placed highest in 2003 at #17 of 32, and lowest in 2006 at #48 of 61. It spent 0 of its 17 ranked years in the top half of its class.

Every configuration on record

All 17 configurations EPA lists for this nameplate, newest first.

How the rating has moved between model years

Comparing the best-rated configuration of each year. 1 of 1 year-over-year steps improved the top rating.

What Q45 fuel costs over a year

At the EPA's 11,500 miles a year, the 2006 Infiniti Q45 burns 639 to 639 gallons depending on configuration. Below is what that costs at three pump prices, and how much more the thirstiest configuration costs than the most efficient one.

EPA’s own estimate for the 2006 model year is $4,300 to $4,300 a year in fuel, or $10,250 more than the average new vehicle over five years.

How it compares with other Midsize Cars

Across the 483 nameplates EPA classifies as Midsize Cars, the median best combined rating is 25 mpg. At 18 mpg the Infiniti Q45 is 7 mpg below the median, which is worth about $626 a year at $3.50 a gallon.

• All Midsize Cars rankings — every nameplate in the class, best to worst.

Other Infiniti nameplates

Every Infiniti model compared → — all nameplates ranked by best combined rating, with what each one costs a year.