Octane? - Honda Prelude Forum

93PreludeSR · 06-12-2002, 05:19 PM

Hi everyone,

I would just like to know what Octane of gas you recommend I put in my car.

Also, is there any difference in power if I were to put in a lower Octane?

Thanks.

96LudeVTEC · 06-12-2002, 06:51 PM

I always go with 93 ocatne from Chevron, because that what my brother Recomends and he is a Tech at Rusty Wallis Honda in Dallas.

I don't think, however, that lower octane would hurt your engine though

SiR-P12eLude · 06-12-2002, 07:32 PM

VTECs and si use 91 ALWAYS.... even the manual says so... but the lowest model is okay to use whatevers....

Satan_SRV · 06-12-2002, 07:40 PM

You're in Canada....whatever you do don't use Sunoco Ultra 94..that ethanol crap will kill your performance.

brendon2k · 06-12-2002, 09:11 PM

Quote:

Originally posted by Satan_SRV
You're in Canada....whatever you do don't use Sunoco Ultra 94..that ethanol crap will kill your performance.

How come?

BTW I use 91 which is highest available here. If you don't run a high enough grade gas you car will retard the timing to keep the car from knocking so you can get away with lower grades.

Satan_SRV · 06-12-2002, 10:33 PM

Quote:

Originally posted by brendon2k

How come?

It's cause of the Ethanol....I've proven it with 5-10 preludes already, everyone using Ultra 94 (up to 10% ethanol) with good plugs etc...was experiencing hesitation under high throttle...

Couldn't figure it out till I switched to Esso 92....and it was gone. Since then I have been telling people here in Canada and it seems to work for everybody I run into. Ethanol is not good for prelude engines...it my pump the octane up but it just BLOWS in performance. Which is so ironic cause the advertise it as a high-performance gasoline, however it is really great on the environment....too bad

93PreludeSR · 06-12-2002, 10:51 PM

Thanks guys...

I have not been using 91 Octane lately. Next time I fill up I'll throw some in!

AmunRa · 06-12-2002, 11:21 PM

ive never had any problems w/ sunoco's 94...actually it runs alot better...guess its a prelude thing

PreludeNL · 06-13-2002, 03:41 AM

What do they change on the engine that would make it run on a higher or lower octane?
'Cause the lowest we've got over here is 95.. and I run on 98.

They say that if you chip the engine the remove the ability of the car running on a lower octane..
So they tell me..

Satan_SRV · 06-13-2002, 05:44 AM

Quote:

Originally posted by AmunRa
ive never had any problems w/ sunoco's 94...actually it runs alot better...guess its a prelude thing

Yeah so far I've only seen it in Preludes, but consistently. Also only in a stock-ish configutations

hugo boss · 06-14-2002, 03:56 AM

same here..i used high octane (98 RON) from BP or SHELL.

Prelude_2_NV · 06-14-2002, 08:25 PM

i use mohawk's 94 octane here in vancouver...it's also a 10% ethanol blend but my car runs really well

go figure

TheRedPrelude · 06-15-2002, 03:03 PM

I use 93 at Chevron here in AL, these ludes are advanced enough to use 87 octane, the computer reconfigures the engine to handle it, but it's not reccommended, if you use it, expect anywhere from a 10-15HP drop

TurboLude7 · 06-15-2002, 03:36 PM

Quote:

Originally posted by PreludeNL
What do they change on the engine that would make it run on a higher or lower octane?
'Cause the lowest we've got over here is 95.. and I run on 98.

They say that if you chip the engine the remove the ability of the car running on a lower octane..
So they tell me..

DAMN IT MUST BE NICE TO HAVE READILY AVAILABLE 95-98 OCATANE ON THE PUMPS. why would u want to jack with your car to run a lower octane ?

Si4WS · 06-15-2002, 03:40 PM

use what the manual recomends, can't go wrong unless your FI or you raise the compression

shadowZZ · 06-15-2002, 09:50 PM

92 octane is the highest you can get in Calgary at Esso

CrazyKid · 06-16-2002, 12:03 PM

hmmm im running 116 in my car right now ... with the timming retarded a bit... and the car is stupid fast and runs amazingly well... too bad it was $3.98/L CDN dollars...

PreludeNL · 06-17-2002, 07:04 AM

Quote:

Originally posted by TurboLude7

DAMN IT MUST BE NICE TO HAVE READILY AVAILABLE 95-98 OCATANE ON THE PUMPS. why would u want to jack with your car to run a lower octane ?

It's not that I want it to run on a lower octane, but it seems the engine management is standard adjusted for running on a lower octane.
Since the lowest we've got is 95, if you chip it, they remove whatever it is that they have adjusted at Honda. Hereby you get some more power.
But I want to what they would remove.. is it timing or what is it?

CrazyKid · 06-19-2002, 04:44 PM

if your is the european version... you should be ok... the ecu should be tuned to euro standards... i would love to have 95-98 readily avalible at the pumps... hell for me to get 116 is ap ain in the ass and alot of $$ so i usally only run 94...

JayZ98 · 06-21-2002, 05:51 AM

Around here we have 91-94.I have been doing a test of the above gas for about 3 months.First was the mobil, car is crisp clean and mean.Sunoco It just SUCKED.Hesitation, poor preformance, I thought it was mabey my plugs but, I put 15 in of the Mobil yesterday after letting the light come on for my tank and about 10 mins later WOW what a difference.

I would think that the higher octain raiting would be better ?

Jay