DrewBrews

I have a integra gsr and says unleaded premium fuel but do i really have to use premium? can i use regular 87?

senser1080

You can, but you're gonna suck, and your car's gonna suck. It'll retard the timing in your engine and it's not going to run as well as it should. Could lead to more problems in the future too.

nsxtasy

It will also reduce performance. So if it reduces your gas mileage by 2-3 mpg, that more than offsets any savings from the difference in price.

Just stick with premium unleaded, 91 octane or higher.

1ercfrmr

Do Not use regular...you'll start to notice a pinging engine noise and it just all downhill from there. If you must, use an octane booster and don't make a habit of it.

v8killaz

does this situation concern my car 99 si also

it says put premium only, ive always used reg.

thread jacked srry

senser1080

yes

nathan_559

if it says premium use premium 91 or up anything less will still make your car run but not to its full potential

Turbodude06

Your not saving any money using reg. like someone else said, when u use premium u get better MPG and I've added it up before in my old GSR and I was spending the same amount and who knows what running 87 will do after a long period of time... Sure if u can't get anything else u can run it, but I wouldn't be getting on your car at all and I wouldn't do it often.....

twentyhurtz

due to the high compression of your motor, you need to run premium, plain and simple.. unless you want detonation..

MilanoRedDashR

20 cents a gallon... come on

vegas

I'm with this guy.. 2 dimes really isn't worth risking pinging/detonation and eventual mechanical failure. Run the premium my friend..

-veg

White GSR

CoreyR

seriously its a 10 gallon tank, youre saving like $2 a fill. if you cant afford the right gas you should buy a lower end car.

keepinitrehaal

$2 really? Im sure someone will give you $2 dollars at the pump if you asked. Save the hassel in the long run, use 91+

v8killaz

not that it means anyhting to me but alot of my cras said put premium and ive put the cheapest stuff in it, these are my dd and i dont race at all or even hit the throttle

ive never had a problem and i dont think i ever will
but now that u guys are saying it will improve gas mileage ill put it to the test if it beats my 30mpg city highway combined ill switch it up

GagnarTheUnruly

iTrader: (3)

People who live at high elevation may not need to run 91 all the time, because detonation is less likely when the air is thin and the effective compression ratio is lower.

nsxtasy

Remind me not to ever buy a used car from you.

Hmmm... The last part of your sentence is true. However, most of the country has 93 octane as premium fuel. The high elevations (e.g. Denver) have had 91 octane as premium for many years, for the reason you have stated. (It's only been a few years that they started selling only 91 octane as premium on the West Coast.) So 91 is already a lower octane from what's being sold as premium in the Eastern half of the country. I don't think I would go lower than that, even at higher elevations.

GagnarTheUnruly

iTrader: (3)

That's funny, because I've never lived anywhere as an adult that had more than 91! (Kansas, upstate NY, Montana). I always buy 91 for the GS-R and 87 for the CR-V even though I'm at elevation. To some extent the lower likelihood of detonation due to thinness of the air seems offset by the fact that the car is more likely to be in a situation where detonation is likely -- low rpm under high load and high throttle openings (maintaining speed on inclines when thin air means less power).

Some stations here only sell 85 88 and 91, and it drives me crazy when I am trying to fill up the CR-V on I-90 and I have to pay for mid-level fuel

redacura

Funny I used 87 for the last 7 years and never had a problem. Never really payed attention to MPG, but if you say 91 or better gets you better milage, I might as well start using 91. like you said 2.00 more or so.

v8killaz

hey man 150k miles and going on my b

I take care of my cars

roycivic92

i have a 97 b20 in my car should i run 91 octane

v8killaz

b20 non vtec
not needed

but it wouldnt hurt. its def. not needed though

Turbodude06

^x2 premium is only needed for higher compression motors like the B16's, B18c's, and H22's... Mostly the vtec motors or built non vtec guys.... but it never hurts to run it cause u will more then likely get better MPG and sometime more performance(not always)....

GagnarTheUnruly

iTrader: (3)

Yeah it wouldn't hurt your car but it does hurt your pocketbook. There's no reason to exceed manufacturer recommendation on fuel -- I'd stick with the 87 octane for a regular B20 (it's what I do, at least).

Schister66

The fuel is recommended at a certain grade for a reason. If you run a lower grade fuel, you run the risk of pre-ignition/detonation which far exceeds the savings from 87 - 91 octane fuels. The caveat is that running a cheaper 87 octane fuel lowers your mileage such that the cost 'savings' are negated. It may seem a good idea and cheaper now to run 87, but in the end, you won't save anything...