Vibe GT mileage vs. Matrix XRS mileage

[noginsk]

I just got off the pontiac and toyota websites different mileage epa estimates from the same 2zz engine. Pontiac says 25/32 and Toyota say 25/30. Any thoughts?

[ebslopp]

Different bodies equals different drag coefficients. Hence the difference in HW milage. drag isn't a factor in determining city driving however. So the Vibe has a slightly better drag coefficient than the Matrix.

[StampedeVibe]

Interesting. I figured that the roof rack would cause MORE drag.

[joatmon]

The US EPA mileage estimates can be looked up at http://www.fueleconomy.govFor the 2004 Matrix/Vibe, the numbers for the Matrix are the same as for Vibe:base 29/36 (5 speed)AWD 26/31GT/XRS 25/32However, for the base with auto tranny, the Vibe is rated at 29/34, and the Matrix is rated at 28/33. 2003 vibe and matrix base/auto were both 28/33, so the Vibe numbers went up by 1 each for 2004.If you put any faith in EPA mileage estimates.maybe the 25/30 was a typo. Was the Toyota 25/30 number for 2004's or 2005's? fueleconomy.gov doesn't have 2005 numbers yet

[noginsk]

Quote, originally posted by joatmon » Was the Toyota 25/30 number for 2004's or 2005's? fueleconomy.gov doesn't have 2005 numbers yetI would assume it was for 2004. I really don't remember. I don't know if 2005's are even available yet?

[noginsk]

Quote, originally posted by StampedeVibe »Interesting. I figured that the roof rack would cause MORE drag.I thought this too, which really baffled me. Maybe the body kit on the xrs has an effect greater than the roof rack?

[teammonkeys]

I get nothing close to the 31 on highway... Currently, I get 24 on highway on my s/c AWD