different gas, different gas mileage
in [Technical]
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From: Tegger on 3 Mar 2010 18:55 kludge(a)panix.com (Scott Dorsey) wrote in news:hmlmki$7or$1(a)panix2.panix.com: > Rob <me_(a)home.orgg> wrote: >> >>local techs recommend a small amount of amsoil 2 stroke in your gas >>tank but a very small amount, about 1 ounce per 10 gallons i think >>but i am checking on that now. > > Are these by any chance techs who make a large profit on replacing > catalytic converters? Notice "Rob" hasn't got back to us about the results of his "checking"? -- Tegger
From: Tegger on 3 Mar 2010 19:15 Ashton Crusher <demi(a)moore.net> wrote in news:9vsro59d8sdi2nrq6mnoptvnqsg661ufbo(a)4ax.com: > I've always liked chevron gas because it has techroline, which is one > of the best fuel detergents. But I've noticed lately that when I buy > Chevron my 2009 PT seems to get about 2 - 3 mpg worse gas mileage. My > other typical fill up is some "FastGas" type place. This change has > happened often enough that I'm pretty sure it's not completely my > imagination. Anyone else noticed such a change from one brand to > another? On the FastGas I usually get 24.5 on my typical driving > cycle, 70% commute, on the Chevron it drops down to about 22. I always record each and every fillup, writing down the odometer reading, how much went into the tank, and even the date and price. Over 19 years, with an average of almost 18,000 miles per year, I have yet to notice /any/ discernible difference in mileage from one brand to another. Because accurate results require very long-term measuring over many fillups, I run into seasonal temperature variation, which is a confounding factor. However, there /is/ considerable difference in mileage from summer to winter and back again. This difference appears to be unrelated to gasoline brand. There is also considerable difference in mileage when taking a single fillup against the others. I've seen as much as 15% variance in mileage between individual fillups. The variance is erased when many fillups are included in the calculation. This is true even when batches of fillups overlap. I used to think I had seen an approximately 2% drop in mileage between 87- octane and 91-octane, but now I'm not so sure. My test periods extend over two or more seasons, so that 2% could easily be explained by temperature variation. These are just my very careful observations. Take them as you will. -- Tegger
From: Tegger on 3 Mar 2010 19:19 Tegger <invalid(a)invalid.inv> wrote in news:Xns9D30C3D2F6780tegger(a)208.90.168.18: > > However, there /is/ considerable difference in mileage from summer to > winter and back again. This difference appears to be unrelated to > gasoline brand. > Clarification: the word "however" should not be in this paragraph. I ngelected to excise it while rearranging my previous post. -- Tegger
From: Rob on 3 Mar 2010 22:29 that's because some of us have a job.......i cant sit on the web and surf all day "Tegger" <invalid(a)invalid.inv> wrote in message news:Xns9D30C08593CC5tegger(a)208.90.168.18... > kludge(a)panix.com (Scott Dorsey) wrote in > news:hmlmki$7or$1(a)panix2.panix.com: > >> Rob <me_(a)home.orgg> wrote: >>> >>>local techs recommend a small amount of amsoil 2 stroke in your gas >>>tank but a very small amount, about 1 ounce per 10 gallons i think >>>but i am checking on that now. >> >> Are these by any chance techs who make a large profit on replacing >> catalytic converters? > > > > > Notice "Rob" hasn't got back to us about the results of his "checking"? > > > > -- > Tegger >
From: Rob on 3 Mar 2010 22:30
yeah same thing down here.......up to 10%. "Bill Putney" <bptn(a)kinez.net> wrote in message news:7v86etFtitU1(a)mid.individual.net... > Maybe it's different where you are, but here in VA, the decals on the > pumps say something to the effect "May [ < key word] contain up to [ < > more key words] 10% ethanol", so to me it is a real unknown, and who knows > *what* determines from one batch to the next what the exact content is? > > -- > Bill Putney > (To reply by e-mail, replace the last letter of the alphabet in my address > with the letter 'x') > > Rob wrote: >> 10% ethanol out here and that's not a seasonal thing. >> >> local techs recommend a small amount of amsoil 2 stroke in your gas tank >> but a very small amount, about 1 ounce per 10 gallons i think but i am >> checking on that now. >> >> >> "Bill Putney" <bptn(a)kinez.net> wrote in message >> news:7v6s78F7grU1(a)mid.individual.net... >>> Ashton Crusher wrote: >>>> I've always liked chevron gas because it has techroline, which is one >>>> of the best fuel detergents. But I've noticed lately that when I buy >>>> Chevron my 2009 PT seems to get about 2 - 3 mpg worse gas mileage. My >>>> other typical fill up is some "FastGas" type place. This change has >>>> happened often enough that I'm pretty sure it's not completely my >>>> imagination. Anyone else noticed such a change from one brand to >>>> another? On the FastGas I usually get 24.5 on my typical driving >>>> cycle, 70% commute, on the Chevron it drops down to about 22. >>> Amount of alcohol added, seasonal blend formulations and accuracy of the >>> blend, quality of gas as far as moisture/water due to condensation that >>> collects in the tanks, particularly during th winter can be a factor. >>> >>> -- >>> Bill Putney >>> (To reply by e-mail, replace the last letter of the alphabet in my >>> address with the letter 'x') >> |