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Can I Use 91 Ron In A Stock R33?

Jez33

By Jez33,
in General Maintenance

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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

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https://www.sau.com.au/forums/topic/173614-can-i-use-91-ron-in-a-stock-r33/
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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.

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