87 or 89 gasoline!
11-11-2005, 12:03 AM
#41
Junior Member
Join Date: Jan 2005
Posts: 25
Originally Posted by shangtsung
Our engines are 10.5:1 compression. Other cars with that kind of compression recommend 91 octane. Toyota only lists 87 so people won't freak out and to keep costs down (same with the motor and gear oil changes).
11-14-2005, 08:53 AM
#43
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Join Date: Sep 2005
Location: Texas
Posts: 497
an octane is an eight chained hydrocarbon. the 87 is the actual percentage of octane per 100 parts. since an octane can handle high compression well, it's recommended you use a higher octane in high compression engines. the fact is, the 87 rating is an average rating. you might have some parts at 91 and others at 85, so you mix the two to get 87. 87 parts might be stable under compression but the the other 13 parts is not, that's why you dont use it in high compression engines.
high compression = NEEDS 91 octane or higher
low compression = NEEDS 87 octane or higher
so use the approriate type of fuel for your engine. our tC's are not high compression engines, so use the 87 octane.
high compression = NEEDS 91 octane or higher
low compression = NEEDS 87 octane or higher
so use the approriate type of fuel for your engine. our tC's are not high compression engines, so use the 87 octane.
11-14-2005, 09:06 AM
#44
02-27-2006, 07:33 PM
#46
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Join Date: Sep 2005
Location: New York
Posts: 246
Wow. You're all wrong...
89 and 91 DO make a difference.
89/91 and other higher octane fuels give your car better acceleration and higher output.
The money is extracted from your wallets and/or pocketbooks, therefore reducing the overall weight of the vehicle when you're in it. However, those of you who use credit or debit cards at the pumps won't see much of a performance difference and you should stick with 87.
89 and 91 DO make a difference.
89/91 and other higher octane fuels give your car better acceleration and higher output.
The money is extracted from your wallets and/or pocketbooks, therefore reducing the overall weight of the vehicle when you're in it. However, those of you who use credit or debit cards at the pumps won't see much of a performance difference and you should stick with 87.
02-28-2006, 04:06 AM
#50
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Join Date: Jan 2005
Location: Columbus, OH
Posts: 722
Originally Posted by jj010
Originally Posted by emiller
yes. the trd sc reccomends 91 doesnt it?
THE FUEL SYSTEM BACK TO MAIN PAGE
Larger 400cc fuel injectors are included to deliver the extra fuel needed without requiring increased the fuel pressure. No other modifications to the fuel system are required. Premium 91 octane fuel is required.
09-17-2006, 07:26 PM
#57
Originally Posted by FromThisSoil
Wow. You're all wrong...
89 and 91 DO make a difference.
89/91 and other higher octane fuels give your car better acceleration and higher output.
The money is extracted from your wallets and/or pocketbooks, therefore reducing the overall weight of the vehicle when you're in it. However, those of you who use credit or debit cards at the pumps won't see much of a performance difference and you should stick with 87.
89 and 91 DO make a difference.
89/91 and other higher octane fuels give your car better acceleration and higher output.
The money is extracted from your wallets and/or pocketbooks, therefore reducing the overall weight of the vehicle when you're in it. However, those of you who use credit or debit cards at the pumps won't see much of a performance difference and you should stick with 87.
:D:D:D
Anyway. "Search" should be the first thing on the site that pops up, at a 640x480, at least. And there are some things that someone should have their license taken away for. One is telling someone else that 91 gas makes a difference in an 87-recommended engine. Another is filling diesel in your tank.
09-19-2006, 03:48 AM
#58
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Join Date: Feb 2006
Location: Austin, TX ::DEAF::
Posts: 293
Originally Posted by tweetie
91 has better gas mileage... it runs richer...
09-19-2006, 08:43 AM
#59
when you run "richer" that means you're injecting more fuel than what's necessary to maintain a proper a/f ratio.
it doesnt change your mileage unless you needed higher octane to begin with for a higher compression engine.
are we seeing similarities here? turbo? high octane? na high compression? high octane?
HMM.
it doesnt change your mileage unless you needed higher octane to begin with for a higher compression engine.
are we seeing similarities here? turbo? high octane? na high compression? high octane?
HMM.
