What grade of gas? All gas questions answered! **Merged all gas threads**

[twistedframe]

yeah the gasoline has nothing to do with break in.

[missy867]

Originally Posted by ScorchedHands

I didn't find anything about the type of gas in the owners manual....on top of I didn't get one from the dealer until almost a week after I had the car.

The car has a few odd miles over 1000 on it, been running on regular same as I always have. Just didn't occur to me until now. I feel kind of stupid. What confuses me is, everyone says "run premium" but nobody can tell me for sure why?

The very last page of the manual tells you, although now you already know, but it is in the manual!!!!

[06redsi]

Originally Posted by ScorchedHands

I was wondering what grade of gas everyone runs in their 06 Si's? I've been using regular and it's been fine. But I was disturbed because I just read somewhere that I should be using premium?

If anyone knows anything, I'd like to know ASAP! lol

i didnt bother reading any of the replys to this post because it doesnt really matter, you must use premium gas in a 11-1 compression motor. if you use regular you will eventually damage the engine.

[06redsi]

BTW the reason you must use premium in your si, is because regular is more unstable in higher pressures or more flamable, this will cause the fuel to sometimes ignite before its supposed in a i high compression or boosted motor==pre-detonation= bad news. the premium fuel is more stable under higher pressure and will only ignite when the spark plug wants it to. hope that helps.

[XeNonCiViC]

Now that the weather is getting warmer here in Ohio...

I am averaging about 35mpg (70% hwy - 30% city). During the colder months, 29-32 mpg was average.

[pointbrink]

first tank from the dealership and i got 34 mpg with mostly city driving..

i have an ex mt and the numbers were 400.4 miles and it took 11.8 gallons to fill (i drove about 5 miles with no bars left)

[cloudbreakmd]

A little over a 1,000 miles on my car (with almost all city driving) and getting 26.5 mpg...

[wing_gundam]

I figured out mine in gallons - just under 1000km here (620 miles) and getting between 27.5-29 mpg

Interesting side note - they say in Canada the break in point is 500-1000km, whereas im hearing from you guys the breakin point at 500-1000 miles. Maybe it is then (if you believe in this stuff) 620mi/1000km ?

[leekejeun]

damn the gas prices are killin me!...
would it kill the SI is suppose someone like myself was to use Regular Unleaded instead of Premium Unleaded???
because one of the Dealer guys at Honda said it dont really matter what kind of gas i put in...???

[BlackSIguy]

The manual calls for premium.... if you put regular in the tank the risks of you engine starting to ping... will increase..

I know gas is killing but premium is what it needs.... over all you are going to be paying 3-4 dollars more for premium per fill up... vs regular.....

[twistedframe]

you dealer guy is a moron use 93
see here What grade of gas? All gas questions answered! **Merged all gas threads**

[leekejeun]

thanks for the info guys...

[CameronJr9]

Originally Posted by twistedframe

you dealer guy is a moron use 93

Understatement of the year for probably 90% of the salesmen out there.

[Percula]

I did my first check last night, 34mpg at a little over 1100 miles on the OD. I am mostly in stop and slow freeway traffic with a little "big city" driving too. Oh and about 50% of that is with the AC on.

EX Sedan AT

[liuh]

my avg is like 26-27mpg with daily driving being short trips in the city, and weekend being highway driving and short trips again with 3-4 people in the car.

sedan ex AT, i dont know why it's so low. i usually get around 290-300 miles before the gas light turns on.

oooyeah, i have over 3500 miles now

[flyfisher]

My 06 civic lx has 6000 plus miles and I'm averging 39 mpg on the highway and 25 to 29 mpg in town. I live at 5000 plus feet in elevation here in Wyoming. I also use 87 octane fuel?

[Tight_SI]

hey every one my name is justin. I jus bought a new civic si. i wanted to know some stuff. first why am i gettin such bad gas mileage. i only have like 700 miles on my car and have already had to fill up 3 times. also y does the speed not increase in 6th gear my car maxed out at 106 mph. i got a sound system in there maybe that could be it ?? sum1 help

[larryd]

Hmm.. well it sounds to me like you're heavy on the gas if you're flooring it in 6th gear so thats why your gas mileage is poop.

BTW, 6th gear is a cruising gear. It is not meant for acceleration.

[Silver8th]

Originally Posted by larryd

Hmm.. well it sounds to me like you're heavy on the gas if you're flooring it in 6th gear so thats why your gas mileage is poop.

BTW, 6th gear is a cruising gear. It is not meant for acceleration.

Yeah what he said^^
Welcome to 8thcivic Justin. Post up some pics of your Si.

[Janizary]

From the manual - Recommended: 91 minimum

For those folks on the west coast (like me) we don't have 93+ fuel here...barring the occasional 100 pump at a random station. 91 max.