Octane Use Poll - Page 2 - 10th Gen Civic Forum
View Poll Results: What octane are you using in your 10th Gen?
87 32 66.67%
89 6 12.50%
91 6 12.50%
93 4 8.33%
Voters: 48. You may not vote on this poll

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post #11 of 33 (permalink) Old 04-21-2016, 08:40 AM
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Did Honda bring prototypes to high altitudes for testing? Did you get to go with the prototypes to make sure the ECU is adjusting the actuators properly?
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post #12 of 33 (permalink) Old 04-21-2016, 10:49 AM
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Quote:
Originally Posted by 4Tires View Post
Did Honda bring prototypes to high altitudes for testing? Did you get to go with the prototypes to make sure the ECU is adjusting the actuators properly?
I worked for Keihin (Honda subsidiary) from 2005 - 2009. The calibration process is carried out in a controlled lab environment, with subsequent testing done in extreme conditions on a test track, then the camouflaged versions we see in the sneek peeks from different locations. I was involved only with the manufacturing side of the ECU's. From my observations and experiences, Honda takes no shortcuts in their engineering.
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post #13 of 33 (permalink) Old 04-21-2016, 11:20 AM
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That would probably explain why how their cars run overall are so good. Someone in the industry doing what you do, going from company to company and seeing what the various practices are like could probably vouch for that.

I'd be interested in hearing how American car brands compare to Honda.
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post #14 of 33 (permalink) Old 08-19-2016, 09:00 PM
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Running 91 burns a little higher and kicks the turbo in slightly faster as well as the injen CAI. I did notice a little difference when went from 87-91. When driving conservatively I'm able to average 44-46mpg on the highway
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post #15 of 33 (permalink) Old 08-19-2016, 11:51 PM
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The Engineer who developed " The new 1.5 turbo engine" clearly siad that

" higher octain doesn't effect anything at all~~~!!! "
" controled by ecu " " not by octane grade "
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post #16 of 33 (permalink) Old 08-20-2016, 08:04 AM
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I've been using 87 in mine and an very happy that it runs fine on it. This was not the case with my 97 Prelude V-TECH that insisted on premium fuel. Anything less and you could watch the tac bounce up and down until she got what she wanted
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post #17 of 33 (permalink) Old 08-20-2016, 01:09 PM
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This video colud help~~~ watch from 5:08~

Last edited by derekim75; 08-20-2016 at 01:11 PM.
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post #18 of 33 (permalink) Old 08-20-2016, 01:55 PM
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I always love reading octane threads. It's a never ending back and forth lol
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post #19 of 33 (permalink) Old 08-21-2016, 11:48 AM
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I'm buying 87 Octane gas just like the owner's manual says.

Feel free to buy the 89, 91, 93 or race gas if it makes you feel better.

(I'll be taking the money I save and buying high octane, high quality microbrews to sip while I read these silly forum threads.)

Cheers!
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post #20 of 33 (permalink) Old 08-21-2016, 05:29 PM
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The purpose of higher octane fuel is to prevent pre-ignition (knocking) caused by high compression ratios. That's it folks. Unless you are running a high compression engine, such as a Corvette, it is not necessary and a waste. The Civic does not have a high compression ratio engine. Regular and Premium explode with equal intensity when sparked off with the engine's spark plug. One is not more 'powerful' a fuel than the other. However, Premium is engineered to resist ignition simply by being compressed.
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