View Poll Results: what is your average MPG for the tc?
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what is your average MPG for the tC?
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From: Miami, FL
Originally Posted by tCizzler
And anyway, gas mileage is gas mileage whether you take it at a half tank or at a full tank, as long as you are comparing gallons put in the tank as well as distance traveled and filling up the tank to the same point (full).
Originally Posted by tCizzler
Originally Posted by nyr197
Cars rated for 87 octane do not benefit from higher octane fuels.
Higher octane fuels mean they have an increased resistance to ignition than lower octane fuels. You also risk having increased fuel deposits due to unburned fuel.
Higher octane fuels mean they have an increased resistance to ignition than lower octane fuels. You also risk having increased fuel deposits due to unburned fuel.
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Originally Posted by Menace
Originally Posted by tCizzler
And anyway, gas mileage is gas mileage whether you take it at a half tank or at a full tank, as long as you are comparing gallons put in the tank as well as distance traveled and filling up the tank to the same point (full).
Very true, however that is avg mileage , (which IS what this post is about) all i'm saying is that to get exact mileage,for instance, on a road trip, you can calculate mileage anytime.
Originally Posted by tCizzler
Originally Posted by nyr197
Cars rated for 87 octane do not benefit from higher octane fuels.
Higher octane fuels mean they have an increased resistance to ignition than lower octane fuels. You also risk having increased fuel deposits due to unburned fuel.
Higher octane fuels mean they have an increased resistance to ignition than lower octane fuels. You also risk having increased fuel deposits due to unburned fuel.
Originally Posted by Menace
By stock I hope you mean stock compression. Higher octane fuel is only needed to prevent detonation when compression is increased, whether by F/I or higher compression pistons.
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From: San Diego, CA
You can never get an exact mpg as there are too many factors involved in daily driving. Maybe in a lab you can, but that's what the EPA are for, and yet their number is still an estimate. That is why I have included the last column on my graph, overall average mpg.
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From: Miami, FL
Originally Posted by tCizzler
Originally Posted by Menace
By stock I hope you mean stock compression. Higher octane fuel is only needed to prevent detonation when compression is increased, whether by F/I or higher compression pistons.
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From: Pittsburgh, PA
Originally Posted by Menace
Originally Posted by tCizzler
Originally Posted by Menace
By stock I hope you mean stock compression. Higher octane fuel is only needed to prevent detonation when compression is increased, whether by F/I or higher compression pistons.
I couldn't put it any better than this.... The difference is minimal but maybe just enough to cause the need for 89 in MY car, not necessarily everyone else car.
Originally Posted by Web
The difference between 87 and 89 and then 89 to 91 is minimal and SOME same brand cars/engines can adjust a bit more just b/c every engine is not exactly the same. The only problem is, when you get down to the molecular structure of the fuel, 87 has a lower ignition point than 89 and 89 has a lower ignition point than 91. The lower the ignition point, the easier it is to ignite thus, easier for the engine to react to the power production in the chambers. If the engine has to work harder to ignite the fuel, your "performance" is going to suffer and if you have a higher performing engine (high compression pistons or FI) and you use a lower octane fuel, you will cause pre-ignition and damage your head and internals.
The key is to find a fuel that works best for your car. If 89 works great for your car and 87 has a rough idle or pings/knocks, then stick with 89. If you are FI or have high compression internals, than anything less than premium fuel will cause you problems.
The key is to find a fuel that works best for your car. If 89 works great for your car and 87 has a rough idle or pings/knocks, then stick with 89. If you are FI or have high compression internals, than anything less than premium fuel will cause you problems.
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From: Miami, FL
Whats the source of that excerpt and how old is it? Your '05+ Toyota should easily conform to 87 with our compression ratio.
It could be any of the following things; your engine is not up to spec (highly unlikely), there is a difference in additives between 87 and 89 or you use cheap gas (more likely), try using another brand of gas, or it's all in your head after slapping on some bolt ons(most likely scenario).
It could be any of the following things; your engine is not up to spec (highly unlikely), there is a difference in additives between 87 and 89 or you use cheap gas (more likely), try using another brand of gas, or it's all in your head after slapping on some bolt ons(most likely scenario).
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Originally Posted by gjpjr84
and the exhaust would be oxygen and water.
oh wait, theres already a fuel like that, its called hydrogen! lol
oh wait, theres already a fuel like that, its called hydrogen! lol
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Originally Posted by tCizzler
Originally Posted by Menace
Originally Posted by tCizzler
And anyway, gas mileage is gas mileage whether you take it at a half tank or at a full tank, as long as you are comparing gallons put in the tank as well as distance traveled and filling up the tank to the same point (full).
Very true, however that is avg mileage , (which IS what this post is about) all i'm saying is that to get exact mileage,for instance, on a road trip, you can calculate mileage anytime.
Originally Posted by tCizzler
Originally Posted by nyr197
Cars rated for 87 octane do not benefit from higher octane fuels.
Higher octane fuels mean they have an increased resistance to ignition than lower octane fuels. You also risk having increased fuel deposits due to unburned fuel.
Higher octane fuels mean they have an increased resistance to ignition than lower octane fuels. You also risk having increased fuel deposits due to unburned fuel.
Originally Posted by Menace
By stock I hope you mean stock compression. Higher octane fuel is only needed to prevent detonation when compression is increased, whether by F/I or higher compression pistons.
I like how people modify their car, thinking that they are smarter than the engineers that designed it. Then they wonder why there cars don't perform better.
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From: Columbus, OH
Originally Posted by tCizzler
Originally Posted by Menace
Originally Posted by tCizzler
Originally Posted by Menace
By stock I hope you mean stock compression. Higher octane fuel is only needed to prevent detonation when compression is increased, whether by F/I or higher compression pistons.
I couldn't put it any better than this.... The difference is minimal but maybe just enough to cause the need for 89 in MY car, not necessarily everyone else car.
Originally Posted by Web
The difference between 87 and 89 and then 89 to 91 is minimal and SOME same brand cars/engines can adjust a bit more just b/c every engine is not exactly the same. The only problem is, when you get down to the molecular structure of the fuel, 87 has a lower ignition point than 89 and 89 has a lower ignition point than 91. The lower the ignition point, the easier it is to ignite thus, easier for the engine to react to the power production in the chambers. If the engine has to work harder to ignite the fuel, your "performance" is going to suffer and if you have a higher performing engine (high compression pistons or FI) and you use a lower octane fuel, you will cause pre-ignition and damage your head and internals.
The key is to find a fuel that works best for your car. If 89 works great for your car and 87 has a rough idle or pings/knocks, then stick with 89. If you are FI or have high compression internals, than anything less than premium fuel will cause you problems.
The key is to find a fuel that works best for your car. If 89 works great for your car and 87 has a rough idle or pings/knocks, then stick with 89. If you are FI or have high compression internals, than anything less than premium fuel will cause you problems.
The lag and loss of low end power is due to your CAI and 2.5" exhaust. Its too big and unless you changed the compression or added FI you dont need higher octane fuel.
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your gonna say im crazy but im getting a consistent 33 or 34 going to school..and thats 60 miles a day total, 60mph on the hwy and 70 on the interstate....its got a lil over 5k miles on it so i think its gonna stay...I hate to hear that some people are getting in the low 20's..i take it easy though and shift before my rpm reaches 3.5...I've heard humidity, altitude, and temp. can matter alot..
in here in charlotte, NC. where's everyone else?
goodluck!
in here in charlotte, NC. where's everyone else?
goodluck!
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From: San Diego, CA
Originally Posted by DanielNC06
your gonna say im crazy but im getting a consistent 33 or 34 going to school..and thats 60 miles a day total, 60mph on the hwy and 70 on the interstate....its got a lil over 5k miles on it so i think its gonna stay...I hate to hear that some people are getting in the low 20's..i take it easy though and shift before my rpm reaches 3.5...I've heard humidity, altitude, and temp. can matter alot..
in here in charlotte, NC. where's everyone else?
goodluck!
in here in charlotte, NC. where's everyone else?
goodluck!
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Joined: Aug 2006
Posts: 1,520
From: Pittsburgh, PA
Originally Posted by J_Bomb
I like how people modify their car, thinking that they are smarter than the engineers that designed it. Then they wonder why there cars don't perform better.
By saying that you are saying that 90 % of Scion owners think they are smarter than engineers, because of how many people modify theirs. But, oh wait, isn't the scion branch intended for youth drivers that like to modify cars, and they even came out with a spec version to make it cheaper to modify.
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From: Pittsburgh, PA
Originally Posted by emiller
If your car runs better on higher octane fuel than is recommended you probably could use a tune up. Something isnt right because the car is designed to run on 87.
The lag and loss of low end power is due to your CAI and 2.5" exhaust. Its too big and unless you changed the compression or added FI you dont need higher octane fuel.
The lag and loss of low end power is due to your CAI and 2.5" exhaust. Its too big and unless you changed the compression or added FI you dont need higher octane fuel.
Honestly i wish i could find a place that does tunes...Here in Pittsburgh, car shops that tune are hard to come by, and if you find one, it's gonna cost an arm and a leg. And like i said, with the MPGs i'm gettin, especially on the highway, i don't really know if i want to change things.