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04-02-2007, 11:43 AM | #19 | |
Engineer/Artist/House-Dad
Drives: 2006 Toyota Sienna XLE Join Date: Aug 2006
Location: California
Posts: 419
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[QUOTE=Kaotic Lazagna;69908]
Quote:
--B
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His: 2006 Toyota Sienna XLE Arctic Frost Pearl, FC Package, 2007 Solara Nav unit, Spoiler, Running Boards & Auto-dimming rear mirror Hers: 2007 Toyota Yaris LB Black Sand Pearl, Auto, Power Package, Side Airbags, VIP security, USDM center armrest, and accessory 7 spoke 15" alloy wheels Last edited by static808; 04-02-2007 at 03:18 PM. |
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04-02-2007, 11:49 AM | #20 | |
Banned
Drives: 2007 Yaris LB Join Date: Mar 2007
Location: Orange County, Calif
Posts: 284
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[QUOTE=fu_im_from_texas;69779]
Quote:
Your conclusions that you get better gas milage with premium is VERY UNSCIENTIFIC....profoundly subject to massive error. You drive one time, or one tank and you make such silly conclusions? You can drive the same exact route 10 times, and your milage will vary from time to time because you will drive the car differently, too many variables change, temperature outside, number of red/green lights, how fast you drive, etc...don't over simplify this issue so much! The fact is, your car is engineered for 87 octane, and to use higher will NOT provide better gas milage, and in fact will show LESS milage. There is this dillusion all over the net that using premium in a car engineered for regular is better. This is an old wive's tale, and urban myth. Using premium in your Yaris actual can make it have LESS POWER, lower MPG, and run with less pep. Many believe (I do too) that running too high an Octane will shorten the life of your engine because it is not tuned for higher octane, and this could introduce incomplete combustion, and detonation, which stresses the engine and over time will shorten it's life. Don't fall into this bullshit thinking....your car runs the best with 87 octane, and it gets the best MPG with 87....don't get sucked into this thinking that spending more $$ for premium is good for your car, better for MPG, and makes it more powerful...this is all a myth. For our Yaris, HIGH octane = lower power, less MPG. And engine knock and detonation are the same things....nothing to do with rods, old engines, etc.... |
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04-02-2007, 12:46 PM | #21 |
toyota
Drives: 2007 Yaris RS Blazed Join Date: Oct 2006
Location: toronto, canada
Posts: 3,637
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all you need to know is 87 octane burn faster than premium.. although you are paying more on premium ur actually running more km as well..so overall premium is a way to go.abit cleaner than 87...now going 94 aint worth it unless you adj ur timing..
Last edited by marcus; 04-02-2007 at 12:46 PM. Reason: spelling |
04-02-2007, 12:49 PM | #22 | |
Resident Redneck
Drives: 07 Polar White Yaris Sedan 5M Join Date: Jul 2006
Location: Cumming, GA
Posts: 265
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[QUOTE=Spades;69789]
Quote:
Pinging is heard when there is premature detonation, and also when all fuel is not being burned. Folks that use nitrous or turbo without changing spark plugs often hear pinging. Will you hear knocking when using 93 octane in a Yaris? Nope. Will you hear knocking when using 87 octane in a Lexus ES330? Yup.
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My other rides: 2003 Honda Civic LX Coupe 5M- S/C K24 w/ LSD coming soon! 1999 Honda Civic EX Coupe 5M w/ B18 powaa 1985 Toyota Celica GTS Coupe 5M- track whip http://www.importlounge.com |
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04-02-2007, 01:00 PM | #23 | |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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[QUOTE=static808;69915]
Quote:
okay, i'm getting off topic in my own thread. heh. |
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04-02-2007, 01:10 PM | #24 | |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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[QUOTE=Pavel Olavich;69923]
Quote:
i don't believe that premium bullshit one bit. i just decided to run some premium through my tank. and i know it wasn't scientific, but i was merely just telling you guys something. i never said anything about "oh i got so and so mpg with premium, YOU ALL SHOULD START USING PREMIUM!" and i know that variables change with every drive, but i kept all the factors that i can control the same. and i know that the Yaris was engineered for regular (87) gas. it's a friggin' econo car. who would make an economic car that requires premium gas? i've seen tests regarding different grades of fuel, and the results were that basically, "if your car will appreciate the higher grade, then it'll get a few more hp". |
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04-02-2007, 01:12 PM | #25 |
Drives: Yaris S Sedan color Flint Mica Join Date: Jan 2007
Location: Country: USA, State: Georgia, City: Hampton
Posts: 284
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Consumer reports ranked Costco brand Kirkland’s "liquid" laundry detergent number 1 and tide number 2.. FYI.
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04-02-2007, 01:13 PM | #26 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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04-02-2007, 01:19 PM | #27 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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04-02-2007, 01:23 PM | #28 | |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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Quote:
we use premium once in a while in our cars, and every time we do, it gets less mpg. in my dad's Camry, it decreased the mpg by 2 or 3. when i had my GTI, it really decreased it. in fact, the best mpg i got with the GTI, i used Safeway gas. |
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04-02-2007, 02:57 PM | #29 |
The Hated One
Drives: 07 White Manual Sedan Join Date: Sep 2006
Location: Oregon,USA
Posts: 390
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I know brand is off topic, but be carefull filling up at those grocery store chain gas stations. There is a reason their gas is so cheap.
P.S. I agree by all means Moose...low octane in a boosted or high compression car is bad news...I was hoping my post implied that. My whole goal was to get people to understand what octane rating meant. P.S.P.S. I do not belive that higher octane fuel burns cleaner and has less emissions than 87 does in a 106hp car... the reason is because while the higher octane fuel is normally better quality and may have more addatives, the fact that your little engine is trying to compensate for the delayed ignition ussally means it will be polluting more, and ussually the car without boost or high compression will not be able to burn all the fuel completely since it was ignited a split second later than it should have beem. I have never seen a cars window sticker reccomending what octane to use for best gas milage...wierd. And Marcus, that is some retarded logic. 87 octane does not "burn faster" than premium, it just ignites slower, the burn process takes the same amount of time, your engine does not speed up or slow down. All premium does in your econbox is ignite slower, leaving more deposits in the engine. The engine will not magically gain more RPM's or torque and all of the sudden move slower or faster based on the octane rating. It is NOT cleaner than 87 octane, even with the added detergants most places put in their 92, your engine isn't meant to run it so it will pollute more. Oh, and screwing with the timing on a stock car is for honda boys that want to f-ck up their 89 civic.
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04-02-2007, 03:12 PM | #30 |
Banned
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I tried the premium thing... it seemed to help most on the top end.. but nothing amazing. MPG seemed to be better when driven harder... but under normal conditions, no difference.
shell 87 for me, seems to be the most consistent gas. More than octane - WHERE you buy your gas seems to make the biggest difference. |
04-02-2007, 03:43 PM | #31 |
Clean and (dis)Functional
Drives: Yaris 2dr--Black Betty Join Date: Mar 2007
Location: Tropical Minnesota
Posts: 562
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I'm just an old toad but.......Higher compression does make more power thus better gas milage. Without computers on our engines 9:1 compression is about tops for 87 octane, the ECU is the only thing keeping the engine from self distruction at 10.5:1 by adjusting the timing because of the detonation sensor feedback. With better octane the timing can be advanced to a much more efficient state thus getting better millage and power.
An example is back in the early seventies gas crisis...one group modified a Pinto to try to improve milage. Through the use of another cam, increasing compression from 9:1 to 12:1, and using water injection to reduce detonation (research water/alcohol injection in combination with turbo/super charging) they increased horsepower 50% and milage went from 30 to 45 on a controlled track. Now 12:1 is pretty extreme but as long as you can control detonation (water injection) you can set your timing to take advantage of this. No ECU's back then, now we do! Now we have the ECU setting our timing through detonation sensors to the optimum setting for efficiency (we maybe could run 87 octane at 10:1 compression but without the real world timing adjustments done by an ECU, performance would be crap). In other words due to the ECU adjusting timing in real time, YES you should get better gas milage and performance with higher octane fuel !!!!! Does it pay to use premium? If you get 3% gain in milage and premium is 2% more cost than 87 octane go for it because performance increases also. I don't have a scangauge yet, but I'd go by the facts before the myth that higher octane doesn't help. Computers have really changed the word since the 70's. |
04-02-2007, 03:47 PM | #32 |
Clean and (dis)Functional
Drives: Yaris 2dr--Black Betty Join Date: Mar 2007
Location: Tropical Minnesota
Posts: 562
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I forgot to add...the Yaris was designed to run on 87 octane for the convenience of the consumer ....that doesn't meen that higher octane isn't better when the computer adjusts for it!!!
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04-02-2007, 03:59 PM | #33 | |
Engineer/Artist/House-Dad
Drives: 2006 Toyota Sienna XLE Join Date: Aug 2006
Location: California
Posts: 419
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Quote:
--B
__________________
His: 2006 Toyota Sienna XLE Arctic Frost Pearl, FC Package, 2007 Solara Nav unit, Spoiler, Running Boards & Auto-dimming rear mirror Hers: 2007 Toyota Yaris LB Black Sand Pearl, Auto, Power Package, Side Airbags, VIP security, USDM center armrest, and accessory 7 spoke 15" alloy wheels |
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04-02-2007, 04:38 PM | #34 |
Clean and (dis)Functional
Drives: Yaris 2dr--Black Betty Join Date: Mar 2007
Location: Tropical Minnesota
Posts: 562
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I'll agree it probably isn't for the milage people but for the lead foots...maybe!! I like the idea of the scangauge just to check...maybe after Uncle Sam gets his hand out of my pocket this month I'll be able to afford one.
I rethought this and looked at the Minnesota gas (which is all 10%ethanol) prices tonight are $2.59 reg and $2.61 prem. ....so premium is 0.8% more costly than regular-----so 'if' my mpg went from 37 to 37.3 it is worth putting in premium!!!!......I'm going to try the extra 2 cents and won't wait for the scangauge Last edited by churp; 04-02-2007 at 07:23 PM. |
04-02-2007, 07:47 PM | #35 |
Drives: '14 GT86, '08 Vitz Join Date: Dec 2006
Location: Central Valley, CA
Posts: 9,873
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wow. over here, the difference between premium and regular is no less than 20 cents. for example, if gas is $3.18 for regular, premium is no less than $3.38. sometimes, the price difference between regular and plus is 12-15 cents already!
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04-02-2007, 11:16 PM | #36 |
Clean and (dis)Functional
Drives: Yaris 2dr--Black Betty Join Date: Mar 2007
Location: Tropical Minnesota
Posts: 562
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Sorry ....the 2 cent difference was between reg and plus (87--89 octane). Think I can still get Premium in Iowa, 20 miles away otherwise no premium for at least 50 miles here in Minnesota, and then it would only be a few stations at most. The 20 cent difference would require about 2.4 mpg increase from 37mpg to be worth it.. enough said,,,
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