98 Pump Fuel - Where to Get?

[SteveIndeed]

I've been running my Yaris on 95 since I bought it but I know the motor's tune holds it back because of the fact that we only get 95 RON at the pumps in SA. I know some guys get 98 or 102 RON from private suppliers at hefty prices but I remember seeing in the past that a few petrol stations offer 98 from their pumps. I remember one being in Pretoria somewhere.

I'm not keen on buying 98 to store at home and I don't think my insurer would cover fuel storage in the garage. If I have to, I will, though. I'll just have to do smaller batches which get dispensed into the car as soon as they're delivered - R850 for 20L at a time.

Anybody know where I can get 98 RON from a station in Gauteng (preferably Joburg and surrounds) somewhere?

 

[eyetac]

Just put a bottle of Octane Booster.. will take it up to around 98 octane on a full tank (more when you drop the petrol/booster ratio)

 

[pɐlΛ‾pɐq‾ƃᴉq]

What is done to your yaris that you need to run 98ron??? best bet would be Octane booster.

EDIT: should've mentioned it's a GR

 

[Vinnige Fanie]

Buy ethanol, Moer in 5l when you wanna hoon it.

Nowhere I know off can you buy higher octane than 95 at the pumps.

 

[NI∀ƆOƆ‾⊥ᴚ∩ʞ]

NF 102.6octane Race Fuel (20litre) - Autostyle Motorsport South Africa

NF 102.6octane Race Fuel (20litre)

www.autostyle.co.za

 

[pɐlΛ‾pɐq‾ƃᴉq]

NF 102.6octane Race Fuel (20litre) - Autostyle Motorsport South Africa

NF 102.6octane Race Fuel (20litre)

www.autostyle.co.za

even this

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labequipsupply.co.za

 

[SteveIndeed]

Thanks, gents. I'll try the octane booster as a first step and report back.

What is done to your yaris that you need to run 98ron??? best bet would be Octane booster.

EDIT: should've mentioned it's a GR

True that, the extra two letters make a bit of a difference.

 

[Taladas]

Considering you're in JHB and with the altitude i guess you'll see some slight gains

 

[Trompie67]

Back when BMW Boxer Cup class was going strong, we ran a dyno test on different fuels. We ran 93, 95, 98 & 102 octane - the 102 being Sasol racing fuel that was silly expensive.
Made sure to drain tank between each octane & then did 5 pulls on the dyno of each type of fuel.

Any hp gain/differences could be ascribed to being within the margin of error. Ultimately: Made very little visible difference on the dyno results (5% was the greatest difference iirc), and certainly no difference that could be felt on the track. If it was not for confirmation bias nobody would've known any different!

 

[Kamikaze]

Back when BMW Boxer Cup class was going strong, we ran a dyno test on different fuels. We ran 93, 95, 98 & 102 octane - the 102 being Sasol racing fuel that was silly expensive.
Made sure to drain tank between each octane & then did 5 pulls on the dyno of each type of fuel.

Any hp gain/differences could be ascribed to being within the margin of error. Ultimately: Made very little visible difference on the dyno results (5% was the greatest difference iirc), and certainly no difference that could be felt on the track. If it was not for confirmation bias nobody would've known any different!

Shouldn't an engine be dyno tuned on a certain octane fuel to get the most out of it? So if the BMW was tuned to handle say 93 and you put in 102, the engine would be none wiser - hence you saw no difference.

 

[pɐlΛ‾pɐq‾ƃᴉq]

Back when BMW Boxer Cup class was going strong, we ran a dyno test on different fuels. We ran 93, 95, 98 & 102 octane - the 102 being Sasol racing fuel that was silly expensive.
Made sure to drain tank between each octane & then did 5 pulls on the dyno of each type of fuel.

Any hp gain/differences could be ascribed to being within the margin of error. Ultimately: Made very little visible difference on the dyno results (5% was the greatest difference iirc), and certainly no difference that could be felt on the track. If it was not for confirmation bias nobody would've known any different!

Were any changes made to ignition timing while on the higher octane fuels?

 

[aiccc]

Back when BMW Boxer Cup class was going strong, we ran a dyno test on different fuels.

This is correct if the engine is tuned to run only on 95 and has no head room with respect to ignition and boost increases.

I do not know if the GR yaris has the ability to add timing to make more power on 98 octane

I use NF race and NF ultra on my car. It has multiple maps. On the dyno it makes more power with more octane. I can also manually add ign and boost pressure above the map limits. The power is knock limited on 95 ron in JHB

So more Ron is worthwhile only is the car is knock limited.

Wynns Octane boost say 3 units. What are the units (1 units = 0.1 RON) IDK???

NF products state ron increases.

Try these guys NXGEN - Performance Specialists


Some car work better with certain Octane booster.


Most car sold in RSA have their igntion and boost limits reduced to handle the 95 ron petrol.


Do you need MO Ron?

 

[Trompie67]

Shouldn't an engine be dyno tuned on a certain octane fuel to get the most out of it? So if the BMW was tuned to handle say 93 and you put in 102, the engine would be none wiser - hence you saw no difference.

Were any changes made to ignition timing while on the higher octane fuels?

Sealed ECU. No changes could be made. In theory the ECU will allow timing to be advanced a little further with each higher octane rating. In reality it made no noticeable difference to the hp ouput.

Flashing the ECU or replacing it will yield some extra hp for sure.

 

[Alley-C]

Back when BMW Boxer Cup class was going strong, we ran a dyno test on different fuels. We ran 93, 95, 98 & 102 octane - the 102 being Sasol racing fuel that was silly expensive.
Made sure to drain tank between each octane & then did 5 pulls on the dyno of each type of fuel.

Any hp gain/differences could be ascribed to being within the margin of error. Ultimately: Made very little visible difference on the dyno results (5% was the greatest difference iirc), and certainly no difference that could be felt on the track. If it was not for confirmation bias nobody would've known any different!

Was the tests run on a NA or Boosted car? If Boosted did you up the boost with each climb in Octane as higher Octane means you can run higher boost. As far as I'm aware the GR Yaris is a Turbo car so it should see gains with higher octane as well as less timing pull when IAT's rise, if the map on the car is setup to take advantage of that.

 

[pɐlΛ‾pɐq‾ƃᴉq]

Sealed ECU. No changes could be made. In theory the ECU will allow timing to be advanced a little further with each higher octane rating. In reality it made no noticeable difference to the hp ouput.

Flashing the ECU or replacing it will yield some extra hp for sure.

IDK man.... If those BM's have knock sensors and are able to add/pull timing. You will definitely notice a change in performance.

 

[aiccc]

This is the only place that I would buy pre-mix fuel

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[Trompie67]

Was the tests run on a NA or Boosted car? If Boosted did you up the boost with each climb in Octane as higher Octane means you can run higher boost. As far as I'm aware the GR Yaris is a Turbo car so it should see gains with higher octane as well as less timing pull when IAT's rise, if the map on the car is setup to take advantage of that.

Boxer Cup = BMW 1200 Boxer motor. Motorcycle.

IDK man.... If those BM's have knock sensors and are able to add/pull timing. You will definitely notice a change in performance.

Of course they have knock sensors. There was no noticeable change in the hp output on the dyno. 5% is not substantial enough to feel any difference.

 

[aiccc]

IDK man.... If those BM's have knock sensors and are able to add/pull timing. You will definitely notice a change in performance.

It can only add up to the max value in the map. If the map is set for 95. 98 will not help

 

[aiccc]

The question "is it Knock limited on current fuel"

 

[aiccc]

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[aiccc]

Tuning videos

Do OEM's detune engines

Free ecu remap lesson

 

[pɐlΛ‾pɐq‾ƃᴉq]

Tuning videos

Do OEM's detune engines

Free ecu remap lesson

 

[dhirennaidoo]

If you're near BP on Rivonia Rd, they do sell OB1 (cash only). I found OB1 visibly (via VCDS on my old Golf) reduced timing change. This was on a stock car.
I use it on track days not for more power, but more to make sure that I'm not relying on a knock sensor while thrashing the car about.

 

[Trompie67]

Tuning videos

Do OEM's detune engines

Free ecu remap lesson

DIY Learning is all fun & games as long as it is not your daily driver, so breaking shit won't leave you without wheels!

Exactly! The only person I'd let loose on my vehicles would be Steve Green from (now) SG Performance. His ECU tuning skills have been acquired & proven over many years.

 

[pɐlΛ‾pɐq‾ƃᴉq]

Exactly! The only person I'd let loose on my vehicles would be Steve Green from (now) SG Performance. His ECU tuning skills have been acquired & proven over many years.

You talking about the guy who "allegedly" screwed over his brother and other clients? Or is this another Steve Green?

 

[Gelid]

My 2 cents. Assuming its stock and there is no knock the higher ron will mean nothing for more power. That said on a track day id still throw in some octane booster just to be kind to the engine before thrashing the hell out of it

 

[Confucius]

You talking about the guy who "allegedly" screwed over his brother and other clients? Or is this another Steve Green?

Yip. Didn’t he really mess up a GTR or was it a mustang. His tuning skills didn’t seem so great then and his after sales customer service was even worse. 🤷‍♂️

 

[Joe Banker]

Just watch your spark plugs if you going to run additives. Stuff like NF chows plugs.

 

[Trompie67]

You talking about the guy who "allegedly" screwed over his brother and other clients? Or is this another Steve Green?

"Allegedly" being the operative word.
I learnt many years ago to never believe what an addict says without personally verifying it. Let alone to believe raging youtube videos!
RGM has, by agreement between them, been liquidated. One will probably snort the proceeds up his nostrils, the other will continue to run a very successful business.

Yip. Didn’t he really mess up a GTR or was it a mustang. His tuning skills didn’t seem so great then and his after sales customer service was even worse. 🤷‍♂️

Doubt that very much - heresy from his brother probably. I have seen the results after his brother destroyed an M3 though.
He is the sole ECU guru/tuner for all the VWSA factory Polo Cup & GT Cup cars, so if his skills weren't up to scratch I somehow doubt he'd be allowed to touch those vehicles costing ZAR1 million plus each.

 

[aiccc]

Just watch your spark plugs if you going to run additives. Stuff like NF chows plugs.

I have been running it for 20 years.

The correct dose does not wreck plugs

But many have wrecked their plugs.