Regular Gas is Recommended. Use it!
03-11-2009, 06:16 PM
#41
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Hahaha, watch this.
I put 93 octane in my old tC for one tank of gas and I got 11 MPG. I guess since I got such bad gas mileage, that's proof that 93 isn't as good as 87.
^ That's as credible as everything else in this thread, 93 octane related.
I put 93 octane in my old tC for one tank of gas and I got 11 MPG. I guess since I got such bad gas mileage, that's proof that 93 isn't as good as 87.
^ That's as credible as everything else in this thread, 93 octane related.
03-11-2009, 06:44 PM
#44
Originally Posted by CarbonXe
Hahaha, watch this.
I put 93 octane in my old tC for one tank of gas and I got 11 MPG. I guess since I got such bad gas mileage, that's proof that 93 isn't as good as 87.
^ That's as credible as everything else in this thread, 93 octane related.
I put 93 octane in my old tC for one tank of gas and I got 11 MPG. I guess since I got such bad gas mileage, that's proof that 93 isn't as good as 87.
^ That's as credible as everything else in this thread, 93 octane related.
03-11-2009, 06:54 PM
#45
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Originally Posted by ack154
Originally Posted by CarbonXe
Hahaha, watch this.
I put 93 octane in my old tC for one tank of gas and I got 11 MPG. I guess since I got such bad gas mileage, that's proof that 93 isn't as good as 87.
^ That's as credible as everything else in this thread, 93 octane related.
I put 93 octane in my old tC for one tank of gas and I got 11 MPG. I guess since I got such bad gas mileage, that's proof that 93 isn't as good as 87.
^ That's as credible as everything else in this thread, 93 octane related.
03-11-2009, 09:01 PM
#46
caranddriver
You might want to add that to your list. I felt compelled to show you this as I did more research. "We should note that even cars designed to run on regular fuel might require higher octane as they age." But none the less it supports what you are trying to get across. Pretty interesting.
You might want to add that to your list. I felt compelled to show you this as I did more research. "We should note that even cars designed to run on regular fuel might require higher octane as they age." But none the less it supports what you are trying to get across. Pretty interesting.
03-11-2009, 09:33 PM
#47
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Originally Posted by Domo
Our tests confirm that for most cars there is no compelling reason to buy more expensive fuel than the factory recommends, as any performance gain realized will surely be far less than the percentage hike in price.
03-11-2009, 09:37 PM
#48
Originally Posted by Domo
caranddriver
You might want to add that to your list. I felt compelled to show you this as I did more research. "We should note that even cars designed to run on regular fuel might require higher octane as they age." But none the less it supports what you are trying to get across. Pretty interesting.
You might want to add that to your list. I felt compelled to show you this as I did more research. "We should note that even cars designed to run on regular fuel might require higher octane as they age." But none the less it supports what you are trying to get across. Pretty interesting.
03-11-2009, 09:39 PM
#49
Originally Posted by CarbonXe
Originally Posted by Domo
Copy/Paste FTW: http://www.caranddriver.com/reviews/...ts+page-2.html
03-11-2009, 09:48 PM
#51
Originally Posted by CarbonXe
Originally Posted by Domo
03-12-2009, 12:36 AM
#53
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true, i have gone back and forth btw premium and regular just to see the difference and there is none. ill just save the extra dollar or two and run regular. unless someone shows me some diffinitive proof that the na tc will run better with 91, then ill use it again, but until then, why waste the money.
03-17-2009, 02:38 AM
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Re: Regular Gas is Recommended. Use it!
Originally Posted by ack154
I see many people come on here talking about how they run premium gas in their stock/NA tC and I hang my head in shame a little lower each time. Our manual recommends regular fuel, 87 octane. Why would you run any higher? Do you just want to throw money away? You're not getting any real benefit from it and if you think you are, it's all in your head. Run 87. It's what your car wants.
Now if you're boosted... turbo or supercharged, you should be running Premium (at least 91, I believe). But that is a whole different story and this is all directed at the NA people though.
Our manual says the following (pg 234 for 2005MY and pg 236 for 2006MY):
No, this does not mean 91 is actually recommended or ideal. The 91 is just another type of rating system used to determine the pump rating... explained here:
Taken from here: https://www.scionlife.com/forums/viewtopic.php?t=76399
Further Reading:
- http://tinyurl.com/c3dgoe (caranddriver.com link borked by the forum)
- http://www.usatoday.com/money/autos/...emiumgas_x.htm
- http://www.msnbc.msn.com/id/25691323/
- http://www.kiplinger.com/columns/car...4/car1105.html
- http://www.straightdope.com/columns/...nd-regular-gas
- http://www.consumerenergycenter.org/...s_premium.html
- http://www.ftc.gov/bcp/edu/pubs/cons...s/aut12.shtmjj
- http://en.wikipedia.org/wiki/Octane_rating
- http://www.google.com
* NOTE: If you switch back to regular from Premium, it is possible you could have a rough idle or something for the first tank. I don't know if this is true or not, but thought I'd throw it out here in case someone switched back to regular and wanted to come on here and complain that it's hurting their car now.
Now if you're boosted... turbo or supercharged, you should be running Premium (at least 91, I believe). But that is a whole different story and this is all directed at the NA people though.
Originally Posted by Kiplinger
The premium myth
One thing's for sure -- if your owner's manual doesn't recommend premium, you're wasting your money if you use it. You simply can't buy extra performance.
In fact, because it's harder to ignite, the higher-octane gas could make your car harder to start and run less smoothly, especially as the weather turns colder.
One thing's for sure -- if your owner's manual doesn't recommend premium, you're wasting your money if you use it. You simply can't buy extra performance.
In fact, because it's harder to ignite, the higher-octane gas could make your car harder to start and run less smoothly, especially as the weather turns colder.
Originally Posted by Manual
Unleaded gasoline, Octane Rating 87 (Research Octane Number 91) or higher.
Originally Posted by jmiller20874
"Research Octane" is just one of two numbers used to determine "pump octane".
If you look at the gas pump, under the octane number it should say "Determined by the (R+M)/2 method". The "R" in the formula is the "Research Octane Number", the "M" is the "Motor Octane Number".
So if it says that to use 91 RON the MON would be at 83 hence (91 RON + 83 MON)/2 = 87 Pump Octane
If you look at the gas pump, under the octane number it should say "Determined by the (R+M)/2 method". The "R" in the formula is the "Research Octane Number", the "M" is the "Motor Octane Number".
So if it says that to use 91 RON the MON would be at 83 hence (91 RON + 83 MON)/2 = 87 Pump Octane
Further Reading:
- http://tinyurl.com/c3dgoe (caranddriver.com link borked by the forum)
- http://www.usatoday.com/money/autos/...emiumgas_x.htm
- http://www.msnbc.msn.com/id/25691323/
- http://www.kiplinger.com/columns/car...4/car1105.html
- http://www.straightdope.com/columns/...nd-regular-gas
- http://www.consumerenergycenter.org/...s_premium.html
- http://www.ftc.gov/bcp/edu/pubs/cons...s/aut12.shtmjj
- http://en.wikipedia.org/wiki/Octane_rating
- http://www.google.com
* NOTE: If you switch back to regular from Premium, it is possible you could have a rough idle or something for the first tank. I don't know if this is true or not, but thought I'd throw it out here in case someone switched back to regular and wanted to come on here and complain that it's hurting their car now.
True....there is not a substantial difference between the 87 grade octane fuel and say the premium fuel (91 or 93 depending on the state).... However...this is my 2 cents.... there are a few fuel supplier companies such as Shell, that does make it an advantage especially in the winter months to run premium blend. They are one of just a few companies that I know of that if you purchase the premium that is the one grade of fuel that they do NOT dilute with ethanol. Hence... it is worth the extra few cents a gallon because you get normal gas mileage...and not the crappy mileage that ethanol induced grades. I literally get an extra 80 miles out of every tank using premium...which more than pays for the initial cost at the pump.
03-17-2009, 02:42 AM
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other than what I just posted above... the only other advantage of running a higher octane fuel is that it burns more completely than lower grades. So.... if you plan on keeping your car for a decent length of time... it will prolong the life-span of the internals... especially the valves. you will see less build-up over time using a fuel that burns more completely...and therefore extends the life of the parts in your engine...especially the top end.
03-17-2009, 02:55 AM
#58
We already covered the Top Tier Gas ideas (shell and others). Those gases are better than your average Mobile station, ya. But you still don't need a higher grade. You would just be using the better quality gas.
03-17-2009, 03:00 AM
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ok...well my bad for not seeing that in the other pages of this thread.... so I'll give ya that...lol
but you said it... using a better quality fuel does make a difference...short term and long term. And I was also just making the point that Shell is one that I know doesn't add any ethanol to their premium grade....therefore giving you better gas mileage.
but you said it... using a better quality fuel does make a difference...short term and long term. And I was also just making the point that Shell is one that I know doesn't add any ethanol to their premium grade....therefore giving you better gas mileage.
