Rep Power: 275

I'm drivin the only Acura that recommends Regular. The rest premium.

 
Rep Power: 0

no it won't hurt the engine, but if your compression is stock, then running higher than 87 octane have the same effect of detuning your engine. a higher octane either slows the rate of burn and/or increases the difficulty of lighting the gaseous mixture.

gas burns faster under higher pressure. since the vic is a low compression motor, unless you have a tool to manipulate the timing spark to match the high octane burn speed, the detuning is unavoiable with using higher than 87. sure you can slap in a MSD unit and such, but even that won't do crap until you are at the very top end which has to to with M.O.D (motor octane number) which is a representative of high-speed, high-load knock resistance, and even then doing a small this-and-that to use high octane gas won't do shhit to your lap times even with a timing modification.

R.O.D (research octane number) is the spec for low-speed, low-rpm knock resistance, and our cars are specifically developed at honda testing grounds to use the most efficient gas possible for the ROD of our low compression engines. 87 is what'll put the most power to the ground for street driving. track days sure put in 114 octane because you're whipping around the track at full speed on the top end, but for any situ but, use 87

the higher-octane effect of detuning is minimal and won't kill your engine. but you're definitely wasting money.

 
Rep Power: 316

I would suggest that you guys get your girl or someone to go fill up you car and them try to guess if it has reg,hi or super?

 
Rep Power: 304

Hmm... not too rich. I have my own exhaust gas analyzer, and it looks perfect.
I may do a compression check and see where the engine is at. But mine DOES indeed run better and smoother on 91 here. This is odd. Like I said before, my last Honda hated super, ran like crap. My Milled 77 Accord ran fine on damn near anything at all. Ran the same no matter what brand or octane I tried in it. I miss it.

 
Rep Power: 265

I put 89 octane in my dad's 1998 Oddysey with 180000km and it runs alot smoother. I'm gonna try 91 next time.

 
Rep Power: 304

i have recently switched to 91 as well. i have noticed a better idle nad a easier smoother powerband. i also pick up a few ectra miles per tank. its really not htat bad considering your paying what and extra $2.50 a tank. i run iridium plugs and have full exhaust and cai. soon after my headwork ill will probably run 100 oct because i will be bumping the CR by milling the head and running stg2 crower cam set up. oh yeah i usually only run chevron or shell. in socal they seem to be the best gas from my experience.

 
Rep Power: 304

So you notice the same thing... I also use iridiums, and I also get a few more MPG. On 91, that is. I KNOW it's not in my mind.

 
Rep Power: 304

no its not in my mind i honestly check my milage every tank. and i do get a couple more mpg's and a smoother idle and it just feels like it runs smoother all together

 
Rep Power: 304

Oh, it DOES run smoother, and has more zip to it. I wonder if it does have something to do with the gas we get here, maybe even the additives.... IF it's not octane. But I have to tell you, I drove a 4 banger volvo sports sedan in Germany on 104 octane. Man, that car ran GOOOOOD!! Especially on the Autobahn.

 
Rep Power: 304

i have to run 87 in my truck. all i have doen to it now is intake and exhaust and a lower temp thermostat. it doesnt make a bit of difference in my truck but my car idefinately notice the difference

 
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junked up injectors don't have to do with octane. has to do with detergents in the gas brand.

 
Rep Power: 283

Where are you getting your gas from?
Is is from a place that gets good business?

 
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I Get gas from 76 or Chevron around here. Mostly 76. The station is ALWAYS busy, so there's usually fresh gas. Chevron does not run as smooth in both my cars, and mileage goes down. Octane does not matter. But I use it if the 76 has a long line and I'm in a hurry.

 
Rep Power: 283

Try an exxon, sunoco, or mobil and see if the higher octane still makes your civic run better. A freestate in my area gets tons of business but their gas still sucks.

 
Rep Power: 337

you live in la. smog probs maybe the cause of you needing 93. when i use premium in my car i get like 20mpg vs 40 on regular

 
Rep Power: 813

do any of you use fp60 with your 87? it doesn't raise octane but it does kinda make the gas run like higher octane if i explained that right.

 
Rep Power: 304

I'll give that a shot, just to find out. Even though there are none of those anywhere near me. But what the hell.

Oh, Gearbox, no I don't.

 
Rep Power: 813

you really should try it out. it gave me 5mpg more in the city but i do need to recalculate all this since the car is back to stock and i'm using 87 now..

 
Rep Power: 304

I'll try it next time I see some at the autoparts store.

 
Rep Power: 813

www.lubecontrol.com quality can't be bought in stores...yet. the tests speak for themselves.

 
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MOBIL 93 premium octane gas all the way baby! been using it for a year now no problems. thank god.