Honda Civic Fuel, Oil, Cleaners & Other MaintenanceExtending the life of your Honda Civic requires the proper fuel, oil, and cleaners, along with other regularly scheduled maintenance. Keep your Honda Civic fuel and oil at the right levels to keep your Civic on the road longer.
Welcome to civicforums.com!
Welcome to civicforums.com.
You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, at no cost, you will have access to start new topics, reply to conversations, privately message other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join civicforums.com today!
I decided to put 91 octane gas in my car for shits and giggles. The main thing I noticed was the acceleration at high rpms (5000-7000) was much smoother. There was a definate difference in the sound of the engine. Best I can describe it was much smoother, more constant. Lets hear some explanations, are there any reasons this would happen?
To remove this ad, register today for free or log in if already registered!
__________________ take 'er easy, if its hard take 'er twice
Sponsored Links
To avoid seeing this ad in our forum please register at CivicForums.com
By joining our free community you will have access to post topics, respond to polls, upload content and access many other special features.
well do you have k20 type S motor or at least a turbo? if not, putting premium gas in a car design to take regular gas is a complete waste of money
It's my understanding that some higher mileage cars run better on higher octane due to all that sludge and crap that builds up on the valves..injectors..etc.. over time. However, I have 150,000 miles on my '01 and higher octane didn't do crap.
Higher octane isn't bad for our engines is it?? Just not good enough to justify the added cost.
__________________ Life is hard. It's harder when you're stupid.
Search, and learn.
Quote:
Originally Posted by modoman
the same curiosity some people have with the minds of serial killers, i have with ricers.
Quote:
Originally Posted by DeX
You don't have a sport car.
"There are more than 550 million firearms now in circulation, one for every 12 people on the planet. The only question, is how can we arm the other 11."
i didnt notice any difernts when i accidentelie put 94 oct in at sunaco...
i was driving my brother eG with b20 the week befor and just didnt think about it. Put it in and then got the tank toped off an look at the $
thats not right stupid gas pump....
I got more. So I went and picked up some octane booster the NOS type. For more shits and giggles. The bottle is suppose to increase octane by 70 points or 7 full octane numbers so I threw half the bottle in half a tank. I figure it would have added a coulpe numbers, so I may be at 95 octane or something. Anyways, there is a difference. I definately seen a difference on my speedometer. 2nd gear with 87 octane I could hit about 80-85 km/hr before rev limiter, now I can almost hit 100km/hr. 3rd gear with 87 octane I could get to between 130-135 km/hr. , now I can almost hit 150km/hr. in 3rd before the rev limiter. I don't know if the gains came from just the 91 octane or from the Octane Booster, I never noticed my speeds before adding the booster. It could be from the gas or the booster or both. Regardless there must be some power gains if I am hitting higher speeds before getting to the rev limiter. I've read lots of the threads saying that there is no power gains from adding octane, i don't believe the skeptics. Has anyone ever put their theories to the test on a dyno? It seems there are alot of "scientists" out there slamming the idea octane adds power, but I think these people are just sitting there talking, not testing. I read my car manual it says, "86 octane fuel or higher" what does the "or higher" part mean? I think higher octane will add some power, it may not be much power but I SAW a difference and that was with a 1.7L non-VTEC engine. Go Figure!
__________________ take 'er easy, if its hard take 'er twice
Look, dude, of course higher octane is going to add power. That's what octane is. Higher octane= more volatile.
I think I'm gonna have to call a big B-S on the "Going faster in each gear" statement. Not possible. Just cause you added octane doesn't mean your gear ratios change. Each gear is a number, like third gear is 1.022:1. That's not gonna change because your engine's turning harder. You may get to the redline faster, but you're not gonna go faster in each gear. The only explanation I can offer is that maybe the transmission is shifting sooner. It's hard to tell with an auto.
I guess higher octane can change the gears in your transmission/end sarcasm
you can't see gains like that, acceleration is based on torque, but top speed for each gear is based on the gearing which can't change unless you change out your transmission or get custom gears made.
EDIT: Jester beat me too it.
__________________ I Suck @ Sleeping Crew Member #4
Not sure if this may help clear up this discrepancy but I remember watching that Sports Car Revolution show with the Canadian guys and they tested Porche 911 with like 91 and 94 octane. With the lower grade timing was retarded and it gave less hp on the dyno. I'm thinking our ECU's should work the same way and that it will just adjust to the conditions it sees.
You're right on that.. That doesn't make sense at all. I'm not too familiar with km/h but on my EX I can take 2nd gear to roughly 60 and 3rd gear to 80 max at redline.
I have tried higher octane gas and I felt absolutely no extra power. It's a waste of money, which over a year at $.20 extra a gallon comes out to about an extra 60-80 dollars a year, that could pay for three oil changes which will do way more than the higher octane gas, or get a gallon each of lc20 and fp60 from lubecontrol.com. There is no possible way to get gains on a stock d17 by using higher octane gas. Now if you had cams and high comp pistons or were boosted that's different.
All higher octane gas does is make the gas harder to burn under higher compression. We don't have high compression (relatively speaking) so what you are effectively doing is not burning all the gas durning the combustion cycle which = less power. The reason it says 86 or higher in the manual is because a lot of people aren't knowledgeable on petrol and the car makers and oil companies rub each other's backs since they both need each other.
Also the rotation of tires is limited by the transmission when it's in gear, even if the wind was against your back or you were driving harder there is no possible way you can reach a higher top speed in a certain gear than before. All I can say is you must not have paid attention to your top speeds in certain gears before and know you noticed them and think there were gains.
I'm not trying to bash you, just sharing knowledge that I have gained on this site over the last two years.
__________________ I Suck @ Sleeping Crew Member #4
