QUICK QUESTION GUYS JUST BOUGHT AN 03 SI EP3..!! From a lot and no owner's manuel girlfriend's car.My question is does the car require 91 octane and up???Or is 87 octane ok??? Thank's!!

 

You can run unleaded but of course, its not going to run as well as 91

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 02_Si_FTW &raquo;</TD></TR><TR><TD CLASS="quote">You can run unleaded but of course, its not going to run as well as 91</TD></TR></TABLE>

What are you talking about lol. He has to run unleaded gas. 87, 89, 91 and 93 are all unleaded.

 

Manual says 87.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blueshark123 &raquo;</TD></TR><TR><TD CLASS="quote">

What are you talking about lol. He has to run unleaded gas. 87, 89, 91 and 93 are all unleaded.</TD></TR></TABLE>

lol love when people don't know the difference between octanes or whether gas is leaded or not

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SkoundrelUSA &raquo;</TD></TR><TR><TD CLASS="quote">lol love when people don't know the difference between octanes or whether gas is leaded or not</TD></TR></TABLE>
Hehe, I dare anyone in Cali to run leaded and pass inspection.

 

Hey i asked the same question, my gas cap says to only run 91oct. but im cheap and have kpro so i tune for low oct, 87 ftmfw.

 

Yeah, these threads make me want to photocopy my manual so it can be /thread once and for all.

Ninja edit: Uh oh... shop manual does not say 87 octane.

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IT'S 86 OCTANE!


Page 23 of 02/03 Civic Si shop manual.


Modified by WhiteOnRice at 5:02 PM 4/29/2008

 

damn lol. Well the compression is pretty low so I guess it really isn't necessary to go high

 

i have an 02 ep3 and i ran a whole tank through with 87, then with 91. i didnt notice a difference. it ran just as good

 

I've got months on 87, switched to 93 for two tanks (with ecu reset) and as expected, noticed no difference.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WhiteOnRice &raquo;</TD></TR><TR><TD CLASS="quote">I've got months on 87, switched to 93 for two tanks (with ecu reset) and as expected, noticed no difference.</TD></TR></TABLE>

No improvement in gas mileage either?

 

I got like 5-10 more miles per tank.

 

why do ppl think runnin higher octain fuel will make there car run better all it does is stop detination i always see ppl with peice of **** cars and dodge neons puttin high octain fuel in them

 

Hell- only 86!
(is that only for Canadian specs? )
i'm wondering if i can get by with the farmers blend- E-85 ...???

would that work? its only 1 below recomended- (And it's a lot cheaper per gallon around here!)

Wait a sec....
i can get 87 and 89 for the same price, and i usually put in 89,

so when i get to a half a tank- could i mix e-85 into it? (why not?- would it hurt performance?)

if it's ok, and gas hits over $4, i'll give it some consideration!

 

Dude, e-85 means it's 85% ethanol - CH3CH2OH. The octane rating is actually around 100 but it doesn't mean you can use it. In short, your compression is too low for efficient usage.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by WhiteOnRice &raquo;</TD></TR><TR><TD CLASS="quote">Dude, e-85 means it's 85% ethanol - CH3CH2OH. The octane rating is actually around 100 but it doesn't mean you can use it. In short, your compression is too low for efficient usage.</TD></TR></TABLE>
DAMN! stuck paying full price!

well, it was worth a shot! at least i'm not considering "cooking oil" like some people on you tube
(i guess it's for for diesel engines only)
thanks for the heads up Whitey!

i wouldn't want to f'up "lil bandit!"... so i'll stick with the 87 or 89!

 

I got my 04 EP3 last week and it runs on 87 octane--sweeet

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vrrodri &raquo;</TD></TR><TR><TD CLASS="quote">I got my 04 EP3 last week and it runs on 87 octane--sweeet</TD></TR></TABLE>
yeah, because it has the K20A3 (i-vtec = intake only!)
its sad it doesn't put more than 140-145hp to the wheel -
(but a couple of mod$ and it'll beat most cars on the road- up until 70mph!)

They are great daily drivers either way! i love mine!
so,
Congrats on picking one up, to Both- You and the OP!