Gas Mileage (MPG)

[RedRocket]

Wasn't sure where to put those,hope I put it in the right forum.Anyway,We have an 04 Pontiac vibe with the base 1.4l engine,auto transmission and took it on a 300 mile round trip just to see how it would do and what kind of MPG it is getting..It was advertised to geet 36 MPG..But our findings came up short of that..It got right at 30 MPG..Is this normal? Take into account,it was me,my fiance and my 2 parents in the car..Just wanna know what kind of mileage you guys are getting out of your vibes..We are planning a trip (6600miles round trip) this summer and are trying to calculate fuel costs..

[A Psycho Martyr]

I couldn't get ALL hwy miles on my honeymoon(lot of construction and i drove around city too) but I got around 29mpg. And take into consideration I'm on 20s so I went farther than my odometer says I did. That was days after oil change, new air filter, and fuel system treatment.

[Zimm]

Quote, originally posted by RedRocket »Wasn't sure where to put those,hope I put it in the right forum.Anyway,We have an 04 Pontiac vibe with the base 1.4l engine,auto transmission and took it on a 300 mile round trip just to see how it would do and what kind of MPG it is getting..It was advertised to geet 36 MPG..But our findings came up short of that..It got right at 30 MPG..Is this normal? Take into account,it was me,my fiance and my 2 parents in the car..Just wanna know what kind of mileage you guys are getting out of your vibes..We are planning a trip (6600miles round trip) this summer and are trying to calculate fuel costs..you'll probably always get a little worse than normal mileage if you have 4 people in the car. 4 200 pound people is about the same as pulling a small trailer. it's even worse if you're a little over the 200 pound mark (like me!)if you have a lot of miles on your car, or haven't been keeping up with maintainance like oil changes, air filters, fuel injector cleaner, and spark plugs, you'll probably be costing yourself mpg.the other big culprit is tire pressure. because of some issues i've been having with my tires pulling, i have been running at the dealer recommended 32 psi for a couple of weeks so that i could report back to them. not only did the car feel like it was driving in sand all the time, i got about 3 mpg less in the city and 2-3 less on the highway over several tankfuls purchased at my usual gas station. now that i've returned the tire pressure to 38 front 36 rear (cold) my mpg are back to 29 city 33 highway. i just finished switching to synthetic oil today, so i'm hoping to see a slight improvement over those numbers as well, even if only .5 or so mpg.

[cptnsolo77]

I get about 28 mpg combined, run my tires at 38 psi. I also have 2 other passengers with me monday through friday, so i guess its not too bad.

[vibolista]

Your MPGs will be affected by your driving style, condition of your engine and components like spark plugs, air filter... most of the stuff others have mentioned on this thread. How many miles do you have on your car? What tire pressure do maintain? As far as your mileage with an automatic... you're doing on the OK side. Some get better and a few have reported worse.

[sikvibe]

I'm getting about 28 around town if I stay off the pedal and I was getting 32 before the oversized rims/tires and supercharger install.