Jump to content
SAU Community

Can I Use 91 Ron In A Stock R33?

Jez33

By Jez33,
in General Maintenance

 Share

Recommended Posts

Jez33 Apprentice

Jez33

Posted
Posted

Hi guys, im just wondering as the title says if i can run my car on normal unleaded. I have heard a lot about increased risk of detonation and things, and a lot of people tell me better safe than sorry. but im still at school and im struggling to afford to fill her up, so how necessary is it?

Sorry if this has been discussed before

Any experience with problems asociated with running stock cars on normal unleaded would be appreciated, my car is a r33 gts25t completely stock

cheers

Jeremy

Link to comment
https://www.sau.com.au/forums/topic/173614-can-i-use-91-ron-in-a-stock-r33/
Share on other sites
Primordial Grand Master

Primordial

Posted
Posted

Generally, the higher the octane level, the lower the chance of detonation. Detonation damages your engine internals. Your car WILL run on 91 octane, but it's not smart to do so. If you HAVE to run the car on 91, then keep it below 5000rpm and lay off the boost.

The difference is only 10c per litre... Thats only like $6-7 per tank... Buy "home brand" bread and milk instead and give your car some decent juice man :D

The quality of fuel in Japan is higher than here too. Australian premium fuel is pretty much comparable to standard fuel in Japan from what i understand. That means that our standard fuel is definitely not sufficient to run a 'performance' car built in Japan, and designed for Japanese fuel.

Hope this helps..

superspit Mentor

superspit

Posted
Posted (edited)

Hi...

I own a 1995 R33 GTSt.

I use 91 RON fuel....always have...with never an issue to speak of......

.......in my 1996 Briggs and Stratton mower.

Edited by superspit
adam-__- Grand Master

adam-__-

Posted
Posted

Would it be alright to run 91 for weekdays and then fill up with 98 for the weekends? As in use the 91 for daily(no boosting) and 98 when you want to give it a trash? I would assume it'll be fine aslong as you keep it off boost.

Primordial Grand Master

Primordial

Posted
Posted
Would it be alright to run 91 for weekdays and then fill up with 98 for the weekends? As in use the 91 for daily(no boosting) and 98 when you want to give it a trash? I would assume it'll be fine aslong as you keep it off boost.

Yes it would be alright. It would be totally fine to put inferior petrol in your car. Nothing bad will happen. There you go, is that the answer you were looking for?

*Disclaimer* I am not responsible for rebuilding your engine :closedeyes:

Baconer Grand Master

Baconer

Posted
Posted

think of it this way, your saving money by going cheap on petrol and causing damage to your engine. As someone said your only saving about $6-7 per tank and when your engine dies you will have to shell out 50x more then you have saved so far on petrol on an engine rebuild.

Dont be stingey

superspit Mentor

superspit

Posted
Posted (edited)
Hi...

I use to own a 1992 S13 sr20det

I used 91 RON fuel....always did...with never an issue to speak of......

.......oh, except for when the motor detonated and up 'n stopped one evening...$$$$$$

Edited by superspit
Primordial Grand Master

Primordial

Posted
Posted
Seeing that we're on the topic of what type of petrol to use, what would happen if we were to put diesel fuel into our cars? :O

Actually we're all using diesel (yes, all of us). You get about twice as much torque than unleaded. We didnt want to tell you cos we thought it would blow your mind.

Actually your car will knock even more because the octane level is reduced... The oil in the fuel would probably accumulate in the valves, and screw your cat converter. The engine would definitely overheat and crap itself eventually.

blind_elk Grand Master

blind_elk

Posted
Posted

These engines aren't designed to run 91 octane fuel. It would probably cost you more $$$ in poor fuel economy than the added cost of getting 98 octane stuff in the first place.

If you shop at Coles, you can get the discount vouchers to buy Optimax. Woolies/Safeway, you can get Caltex Vortex 95 octane (worst case). Shell probably have a 95 as well.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
 Share
Go to topic listing


  • Similar Content

  • Latest Posts

    • GTSBoy
      Best place to order Authetic R32 Parts in Japan

      By GTSBoy · Posted

      I don't. I mean, mine's not a GTR, but it is a 32 with a lot of GTR stuff on it. But regardless, I typically buy from local suppliers. Getting stuff from Japan is seldom worth the pain. Buying from RHDJapan usually ends up in the final total of your basket being about double what you thought it would be, after all the bullshit fees and such are added on.
    • GTSBoy
      Ethanol Content Sensor - Always at 11%?

      By GTSBoy · Posted

      The hydrocarbon component of E10 can be shittier, and is in fact, shittier, than that used in normal 91RON fuel. That's because the octane boost provided by the ethanol allows them to use stuff that doesn't make the grade without the help. The 1c/L saving typically available on E10 is going to be massively overridden by the increased consumption caused by the ethanol and the crappier HC (ie the HCs will be less dense, meaning that there will definitely be less energy per unit volume than for more dense HCs). That is one of the reasons why P98 will return better fuel consumption than 91 does, even with the ignition timing completely fixed. There is more energy per unit volume because the HCs used in 98 are higher density than in the lawnmower fuel.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      No, I'd suggest that that is the checklist for pneumatic/hydraulic adjustable systems. I would say, based on my years of reading and complying with Australian Standards and similar regulations, that the narrow interpretation of Clause 3.2 b would be the preferred/expected/intended one, by the author, and those using the standard. Wishful thinking need not apply.
    • GTSBoy
      Blue slip

      By GTSBoy · Posted

      Yes they do. For some maybe. But for those used the most by abusers, ie Skylines, the numbers are known. The stock eyebrow height for R32/3 Skylines is about 365/375mm or thereabouts. The minimum such heights are recorded in adjacent columns in the database.
    • soviet_merlin
      Ethanol Content Sensor - Always at 11%?

      By soviet_merlin · Posted

      Hmmm, interesting. Makes me wonder whether there is bias as well. It's the cheapest fuel, so it is used for all kinds of ill-maintained shitboxes which are bound to have issues regardless. Nicer cars tend to require higher octane rated fuel and can't use it anyway. FWIW, the official NSW E10 facts page is decent. 
×
×
  • Create New...