fuel prices going thru the roof again

[Pu241]

I did try buying 91 oct for a couple fills and did see an increase of about 1mpg (maybe 2), but the cost difference didnt make it worth it for me. (which is basically what you said)

If it wasn't for the 2-3 MPG increase the 87/89 price differential wouldn't be worth it for me either. Although I feel it sounds better when its running on 89 vs 87, that's subjective and prone to interpretation, were as the MPG increase is measurable and is documented. I do wonder if I didn't have to run 60 MPH, and more occasionally, if I might not be able to get by with the lower octane! Real gas would also net both of use a little more MPG, but that's not likely to be back anytime soon.

[Darlo]

I did try buying 91 oct for a couple fills and did see an increase of about 1mpg (maybe 2), but the cost difference didnt make it worth it for me. (which is basically what you said)

[Pu241]

Click it, Darlo is correct in his calculations as BTU's are concerned.
But, I run 89 because I see about a 3 MPG difference in my MPG vs 87.
I agree with him in regards to the 91+ octane being as waste, unless you have maxed out the advance on the distributor, and even then I would question if you'd be able to take full advantage of the octane.
Darlo, also is in a unique position, as he has previously stated, that he rarely exceeds 50 MPH, which put him in the sweet spot for the 1.3 engine and he truly may not see any increase in MPG with higher octane fuel.
Much depends on your driving habits and driving environment.

[Darlo]

The most they put in (In Canada) is 10%, and as far as I know, ethanol burns with 60% the output.

So you have 90% reg gas burning at 100% = 90%
Then you have 10% (eth) burning a 60% = 6%

This still gives you a total of 96% output, which means that you would only see an increase of 4.167 (100/96 - 1) if you were to run with no ethanol.

Now keep in mind this is power per volume (aka gas mileage)

[bassman]

$5.14 a gallon here in Sask, $1.36 a litre and a us gallon is 3.78 litres, everyone likes them big trucks..... ha

[Click_It]

If you check your manual, you will see that you should be buying the 87 octane, and anything more than that is just a waste. (I run 87 octane, and get 48 in the summer, and I have also tried (for fun) to run 91 octane to see if it helps, and it does not.)

Does your 87 have ethanol in it though? All our 87 is E10 which apart from worse fuel economy is bad to continue using in our cars is it not? But you raise a good point, your economy is much superior to mine and using lower octane at that. Something to look into.

[Darlo]

If you check your manual, you will see that you should be buying the 87 octane, and anything more than that is just a waste. (I run 87 octane, and get 48 in the summer, and I have also tried (for fun) to run 91 octane to see if it helps, and it does not.)

[Click_It]

Hi guys, I FINALLY got into Fuelly. Since I record most of my fillups in my budget software I had some old details to get some data loaded straight away. I must say I'm nowhere near some of you guys, but I live in a mountainous area so that's probably part of it.

As for fuel prices since we pay in Litres here I had to use Fuelly to convert everything to US Gallons. Average price: $5.01/gallon. Last fill: $5.83/gallon. - 91 octane in US measurements. Most of our 87 is E10 which I don't touch so maybe the $5/gallon mark isn't so bad afterall :S

I used to use 97 octane in my previous car (not a festiva)

[Gomez]

3.65 this morning, 3.90 this afternoon.

[villageidiot]

Paid 4.15 yesterday for 87 octane. I'm getting about 30mpg in my auto festiva driving rather peppy. I'm not complaining.

[FFW]

3.85 now here in Dallas. BTW I saw hummer with license "low mpg"

[Hot_Wheels]

4.04 here time to move!

[ckiesman]

lol. its 3.75 here. The festiva isnt on the road yet, but with the aspire im going almost 3 weeks between fill-ups. I love it. My co-workers all drive pickups, so as they complain about the price of gas i just laugh.

[neanderpaul]

Are you seriously saying you can get 20-25 mpg out of that?

[MJD]

Well, here we go again .....out of storage !

Am going to get the old '99 Dodge Ram out today for going to a memorial service with a friend, just to drive the truck to keep it a bit active, ha ! It has been sitting in garage a good 5 weeks, so gonna move her around to limber her up some. It is a 3/4 ton 4 X 4, maybe if I pray really hard, and cruise it at around 55, it might make HALF the mileage of Festiva ??
Hard to believe, but regular fuel here is still at $3.47, diesel at $4.03 a gal.

:laughing2:

Well, wish me luck !