23 mpg...really???

[tooter]

Originally Posted by Yury

^ the filter is only a couple months old.

Besides, I've been led to believe that in FE vehicles a dirty filter degrades power, not mileage.

With less power you'd be stepping harder on the gas pedal and I'd think that the mileage would decrease. But I could be wrong... I often am.

[xnamerxx]

The only thing I've noticed that really kills fuel economy in these cars is driving to fast ie faster than 75 mph. I've done a few sub 26 mpg tanks but it's always been from driving 90+ mph for long stretches of driving. Being the car has 30k miles on it I doubt anything mechanical or electrical is wrong with the car a bad filter can reduce mileage but you would need a crazy blockage in flow for it to be bad. I'm willing to bet its due to driving style ie flooring it driving through traffic or crusing at 85 mpg on the freeway or having to drive through the mountains things like that.

[WeeYari]

You are way off the mark xnamerxx

Originally Posted by Yury

Driving style: grandpa.

plus there aren't any mountains where the OP lives. Hell, there are hardly any hills.

[Yury]

Originally Posted by WeeYari

You are way off the mark xnamerxx



plus there aren't any mountains where the OP lives. Hell, there are hardly any hills.

and I am not on the highway often.

But generally it's a good point.

[Kaotic Lazagna]

The second I hit the AC button, I'm losing 10mpg. I can see this on my SGII.

[edmscan]

Originally Posted by Yury

Toronto. I reset the trip A on fill up and on the next fill up divide the liters I put in by the amount of km on the trip A.

So to get 23.52 MPG (I trust you are using US MPG). You would need 10 L/100 KM .... which would give you about 375 KM for a tankful / assuming 37.5 Litres for a FILL.

I know this may be boring .... but there are websites like www.Fuelly.com which will make this much easier for you. You only have to enter your KM and LITRES .. and it will calculate your mileage for you. It will allow you to use L/100 Km or Imperial MPG or US MPG whatever your preference is. Have fun.

[Yury]

^ it's not hard without fuelly.com...just a quick calculation before I pull away from the station which I do every time. And I do operate in L/100 km, I only convert to US mpg when I post here so it's easy for the majority of folks on this site.

10L/100km is exactly what I got last time and about 8 before that.
Imperial MPG is basically an irrelevant unit...

[zkay]

Originally Posted by Kaotic Lazagna

The second I hit the AC button, I'm losing 10mpg. I can see this on my SGII.

Not to threadjack, but how can this be?

My wife and I recently took a trip to wisconsin from northeast iowa on I-80 and we had the A/C cranked the entire time (100% cool, set to recycle cabin air rather than cool outside air) and at "3" on the dial and we still got 46.5mpg. It was hot, humid, and there was some medium traffic at several points; never slowing down past 45mph.

I was doing 65-70mph all the way there and back besides the slow areas I mentioned, and not really trying to hypermile. We are also not small people, if there's any delicate way to put it.

I don't understand the huge variances seen here, if only because I generally have gotten a very reliable (and smallish) F/E range with my yaris.

[Yury]

^ is that by calculation after a fill up?

[zkay]

Originally Posted by Yury

^ is that by calculation after a fill up?

I don't usually do the math myself, but have. I generally just get a receipt at the pump and put the information into fuelly. The times I have done the math myself, it's always within .01 of what fuelly gives me back.

[Yury]

that's ok, I just wanted to make sure it's not based on obd data.

I dunno, 45mpg=5.22 L/100 km with 2 adults in a car and ac. I dunno...I never got more than 34 mpg from this car even when I was doing highway commute. Nowdays, with all city my average realistic mileage is around 28 mpg summer and winter. There's a window of couple of months late spring/early summer when it's not to hot and humid and then I might get 31.
All maintenance is very up to date.

On the other hand my mom's Mazda 5's last tank was 18 mpg. She is also all city, very similar driving patterns, but no occupants and a heavier foot than me. In colder and less humid summer weather she gets about 21.

[Kaotic Lazagna]

Originally Posted by zkay

Not to threadjack, but how can this be?

My wife and I recently took a trip to wisconsin from northeast iowa on I-80 and we had the A/C cranked the entire time (100% cool, set to recycle cabin air rather than cool outside air) and at "3" on the dial and we still got 46.5mpg. It was hot, humid, and there was some medium traffic at several points; never slowing down past 45mph.

I was doing 65-70mph all the way there and back besides the slow areas I mentioned, and not really trying to hypermile. We are also not small people, if there's any delicate way to put it.

I don't understand the huge variances seen here, if only because I generally have gotten a very reliable (and smallish) F/E range with my yaris.

No clue. But here's another kicker, just did a trip with the AC on and was averaging ~45mpg. So now it's changed, I'm getting better gas mileage with the AC on than it off since when I drove back home that night (without AC on), I was averaging 40mpg.

[nookandcrannycar]

Originally Posted by xnamerxx

The only thing I've noticed that really kills fuel economy in these cars is driving to fast ie faster than 75 mph. I've done a few sub 26 mpg tanks but it's always been from driving 90+ mph for long stretches of driving. Being the car has 30k miles on it I doubt anything mechanical or electrical is wrong with the car a bad filter can reduce mileage but you would need a crazy blockage in flow for it to be bad. I'm willing to bet its due to driving style ie flooring it driving through traffic or crusing at 85 mpg on the freeway or having to drive through the mountains things like that.

^^^^^ This + wind. My worst overall tank (a bit over 32 mpg) = eastbound on I-10 in Texas on the 80 MPH limit part (between mile marker 62 and mile marker 494) with a strong crosswind to boot.

[Yury]

Weather cooled down, ac is now used significantly less. 27 mpg this time. Better, but still not great. I used to get about that mileage during last winter and same driving patterns.

[Kaotic Lazagna]

Are you using cheap gas, and is it possible that the gas station you're filling up in is still, some how, using winter blend gas (worse gas mileage with winter blend, even worse if using cheap gas).

[Yury]

^ highly unlikely. I use Petro Canada which is one of the major brands around here.
I am not even sure you can get 'cheap gas' around here, it's all major brands everywhere.

[goliath1812]

Maybe try switching to Shell if there's one close by for a couple of tanks, see if that helps..I haven't really heard many good things about Petro, other than Petro Points. lol.

Also, you said tires are inflated properly...try taking them up to around 40 if you feel comfortable. I've been running between 40-44 on all 4 tires with good results.

[Kaotic Lazagna]

Not really sure then. Check your wheel alignment and increase your tire psi. I'm constantly running at 49-51 COLD psi without a problem (sidewall tire psi rating is for cold psi, I believe).