too much vtAK

just wondering, what fuel is recomended for a d16y8 with i/h/e? i know for a stock y8 the manual recomends 87, but what about basic bolt on modifications?

too much vtAK

bump... i know SOMEONE knows the answer to this

AutoXer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dailybeater &raquo;</TD></TR><TR><TD CLASS="quote">just wondering, what fuel is recomended for a d16y8 with i/h/e? i know for a stock y8 the manual recomends 87, but what about basic bolt on modifications?</TD></TR></TABLE>

Same, no need to change fuel for bolt ons.

And you don't need to bump 5 minutes after an initial post, you'll get an answer eventually.

marc-111

iTrader: (1)

^^^^^

too much vtAK

sorry... being impatient. still a noob too.

oh, and thanks for the help.

marc-111

iTrader: (1)

np, me too sometimes when i really needed answer

2volatile

go to a name brand gas station and get mid-grade gas and you will see a difference. premium gas might give you slightly better performance, but for the price difference between mid-grade and premium i would stick to mid-grade.

Kyles ej1

the way gas is i wouldnt get anything higher than 87 unless u boost

AutoXer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2volatile &raquo;</TD></TR><TR><TD CLASS="quote">go to a name brand gas station and get mid-grade gas and you will see a difference. premium gas might give you slightly better performance, but for the price difference between mid-grade and premium i would stick to mid-grade.</TD></TR></TABLE>

Increased octane will not give you increased performance. The octane number is a rating for resistance to ignition. You need higher octane when running boost or high compression to prevent detonation. For a Y8 with bolt ons, there is no reason for anything other than regular.

too much vtAK

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AutoXer &raquo;</TD></TR><TR><TD CLASS="quote">Increased octane will not give you increased performance. The octane number is a rating for resistance to ignition. You need higher octane when running boost or high compression to prevent detonation. For a Y8 with bolt ons, there is no reason for anything other than regular.</TD></TR></TABLE>


will going back to 87 from 89 or 91 after a few tanks damage anything?

chinkest_raver

lol..no but dont change it too much..i dont think its recommended!

AutoXer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by *****est_raver &raquo;</TD></TR><TR><TD CLASS="quote">lol..no but dont change it too much..i dont think its recommended! </TD></TR></TABLE>

I think you may be confused about what octane and octane ratings are. You won't hurt anything by switching fuel grades as long as you run the minimum octane required for your car.

Getting a higher octane than what is recommended is just a waste of money. There are no performance gains to be had, and really no benefit at all.

96 SOHC VTEC

I tried running every octane from 87, 89, to 93 when I had my Civic Ex and I didn't notice a difference between them at all except for a lighter wallet. Stick with 87 octane.

JICEK9

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

I think you may be confused about what octane and octane ratings are. You won't hurt anything by switching fuel grades as long as you run the minimum octane required for your car.

Getting a higher octane than what is recommended is just a waste of money. There are no performance gains to be had, and really no benefit at all.

</TD></TR></TABLE>

you will see ABSOLUTELY no gain from a higher octane fuel. even on a turbo, sc, or NOS application. higher octane does not mean higher horsepower. higher octane should only be used on high compression and forced induction to prevent detonation. but nothing will be felt.

deadlock32

i know exactly what you are thinking.

i've got a delsol SI too and im thinking well if the VTEC needs 93 and the S needs 87... even though the SI says it should use 87 (reg) Maybe i should used 89. Nope drove with 89 for 2 months (i have I/E) and then switched to 87 and i've notice better fuel economy with 87 as well as a less rich smell in the exhaust.

So if you arent boosting/N2O'n and have 1 cam stick with 87.

deadlock32

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 96 SOHC VTEC &raquo;</TD></TR><TR><TD CLASS="quote">I tried running every octane from 87, 89, to 93 when I had my Civic Ex and I didn't notice a difference between them at all except for a lighter wallet. Stick with 87 octane. </TD></TR></TABLE>

OMG... ist only like 1 dollar more for a full tank when you jump from grades like that. you must have some weak arms.

DaveSi677

Althought I have heard that Premium gas ( 91 octane) apparently gets better gas mileage because it is able to burn slower. Can someone tell us if this could be true?

Dave

deadlock32

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93SiVtec677 &raquo;</TD></TR><TR><TD CLASS="quote">Althought I have heard that Premium gas ( 91 octane) apparently gets better gas mileage because it is able to burn slower. Can someone tell us if this could be true?

Dave</TD></TR></TABLE>

If it burned slower it would be worse because no matter how fast the fuel is going to burn you injectors are still going to shoot in the similar amount of fuel you'd have it you would use 87. So now your 02 sensor is detecting fuel in your exhaust and tells the car to ease up on the gas. So now when you punch the gas you are having less fuel per air ratio and flooring it lean, while at the same time at idle you are running a lil rich. A setup that is completely opposite of optimal.

Please I could be very wrong, so correct me = ]

DaveSi677

Could someone correct me or Deadlock on this matter about 91 octane giving bettergas mileage then 87.

thanks
Dave

egOt

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93SiVtec677 &raquo;</TD></TR><TR><TD CLASS="quote">Could someone correct me or Deadlock on this matter about 91 octane giving bettergas mileage then 87.

thanks
Dave</TD></TR></TABLE>

thats what i heard to....but my y7 was detonating and its pretty much stock. The bottom end didnt look too pretty when i pulled the head off while doing a mini me.

Farmer Brown

Unless you have a reason for premium stick with the cheap stuff.
With ethanol.

AutoXer

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 93SiVtec677 &raquo;</TD></TR><TR><TD CLASS="quote">Could someone correct me or Deadlock on this matter about 91 octane giving bettergas mileage then 87.</TD></TR></TABLE>

From everything I've done with engine design, and all I've gathered over the years about these sorts of things (I have a BS in Automotive engineering and worked in the industry for a few years) there is absolutely no way theoretically that you will get better milage with higher octane. If somone can prove me wrong, and show me the data, I would glady go back on my remarks. I have yet to see any real proof of this.

High octane has a higher flash point, which means it's less likely to detonate prematurely in high compression or turbocharged engines. That's it. It does not improve performance, give better milage or give your engine a 'treat' by filling up with it once and a while.

too much vtAK

thanks autoxer!

w

im running 87 with no complaints

jay_cue

i hear Diesel works wonders. well maybe not. like everyone said 87 should be just great, unless you wanna spendi more for 91