What Feul produce the best performance?
 

Was wondering what feul do you use? Should be an interesting post?
Sasol
Shell
BP
Caltex

I was using Sasol, but due to closer connivence i now fill Shell.

BP 93 octane

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Very interesting topic and well worth discussing.

For 1 year I used only Shell, got great fuel cons and performance through tuning was great. Then when Nitro was launched, it happened to be during my SC install and while tuning, we found the timing had to be pulled back so much to compensate for poor quality fuel.

I ran out the remainder of Shell Nitro and filled Engen Primax, back on the dyno, tuned perfectly and got best gains to date.

we have had 4 cars tested on Shell, all lost gains.

Even a 135 fully tuned running 300wkw on our dyno on Engen put Shell Nitro and got 255wkw. Ran out Shell and put Engen, back up to 300wkw.

Based on DBN Engen.
In JHB Engen seems to ping, shows on our dyno charts.

JHB last dyno event I used Sasol and got really good results at altitude.

Interesting topic. :)

At Nelspruit altitude (700m), Engen works best and most consistently for me.
I agree with Ryan - Shell Nitro is terrible, and my car very noticeably retards timing on Shell.

After our 7000km road trip around the country, and using a variety of fuels at various altitudes, I found:

That my car is extremely sensitive to fuel quality.
Shell Nitro was consistently bad everywhere.
Sasol was sometimes good and sometimes very bad (inconsistent).
The other brands seemed similar, but I'd still get a bad batch from time to time.
I've started doubting what's in some filling stations tanks.
Because it says 95 on the pump... well, I'm not sure.

When I get home later, I'll upload a dyno chart which illustrates how much our cars adjust for bad fuel.

Up here Engen pulls timing on top end and Shell Nitro gives bad consumption so I'm sticking to Sasol.

Very good feedback, I swapped now to Shell to see what it does... But agree had good results on Sasol, did not try Engen yet.

You should see the zigzags up top with Engen. :eyebulge: Was wondering what was going on then the dyno operator asked if I was running Engen because they've seen it before.

Any Bp experience? Anyone.

Interesting, will try back on Sasol and see what i notice, will let you all know.......very interesting....

Yes no issues with BP.

I use BP because it happens to be the closest gas station to my house. It is also the newest one around with new pumps so therefore I feel like I'm getting the cleanest gas possible. ;) Also I only use 93 octane and have not had any problems car runs great.

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Interesting topic.

Quick question: At altitude (Gauteng specifically), is there any difference between 93 and 95 on these cars?

I thought there was only 95 on coast and Reef. Did not see 93 on my last visit. Unless Sasol only do 95.
Obviously you want to run highest RON. If you look in the fuel cap it indicates use 98 Ron only...

Car runs on 98 but 95 minimum.

as mentioned to the CPT guys earlier, fuel differs from day to day and station to station.

I run Shell from the same garage and today the car is pinging in the heat while other days its not pinging.

As per my datalogs from my Honda's Hondata EMS, fuel quality is totally variable day to day, station to station. One day logs will add timing +10deg from a station, a week later it will retard -10deg from the exact same station.

All the garages in the same area use the same base fuels. Their additives do differ though.

I use Shell and Engen as I believe their additive packs are best regarding keeping the engine, valves and injectors clean

OK, update on my findings.

Been using Shell in Epping for a while and noticed a gradual increasing in pinging. Very apparent on the hot days we had recently.

Ran my tank almost dry and used Engen from 2 different stations in similar conditions and driving styles.

With Engen, zero pinging regardless of how I drive and regardless of how hot it gets outside.

I will therefore be sticking to the same Engen stations.

I've been driving (only) a day now with Liqui Moly Octane plus in the tank and early observations are that's it's like driving with real butter in the tank (and that's a good thing btw). the throttle response is so much smoother whether in gear or shifting gear...
I've been getting a bit of a short 'buzz' sound from the engine recently when pushing the throttle abruptly (like the engine gets too much or too little petrol - if anyone has any ideas what that could be?) but that's all gone now. I haven't noticed the alleged power gain but the engine just feels so much happier that i'm considering using liqui moly all the time, despite it costing nearly R100 a can.

I also use Liqui-Moly Octane plus from time to time. Your description of butter in the tank is spot on - I found it much smoother. I'm still a skeptic with these boosters and the longevity of my spark-plugs so I use it only on breakfast runs etc. Is that buzz more like a crrrr (not crunchie ad lol!)? Could be pinging...

I fill up with Engen (close to home) yet I still notice some pinging between changes (especially uphill) after sitting in traffic for a while on a hot day.

Shell Nitro was a letdown for me. Have used Caltex - nothing special but not bad either. Sasol seems to be one of the better options but I have yet to use it over an extended period.

i reckon you could describe it as a 'crrrr' too :) for just a fraction of a second after you push the throttle, yet not every time.
can anyone point me to a sound clip of what pinging is supposed to sound like?
I fill up at the same station most of the time (caltex) but it's only the last six weeks or so i've been hearing that sound.

Hi think the opposite is posible .. as the boosters should improve on the plug as we are running below the needed RON the plug burns away.. as in my pref post 30 000 k and the cylinder one plug was gone.. so either run a colder plug or ge the boost to help.. Would like so hear some of the other technical experts view on this ..
I will do a water \ meth kitt in FEB .. to help with my turbo and give me a safety... will also try the booster..

Part of my SC conversion was colder plugs.
That was at 23000 kms, and my original plugs were fine.

:thumbup: Hi Fish Eagle , what plug are you using now and waht boost do you get on the SC ? = KW and Torque.. I would like to compare notes .. I am on a .05 boost and getting 175 KW 300 NM ... Would like to go up to .07 in the next month or so ?

Jacques did lose coil pack on cylinder 1???

I don't know the tech details of the plugs I've got now, but I know that RGM replaced the stock plugs with colder ones.

I'm running 0.5 bar which gives me 168wkw and 317nm

Hi Ryan , was just the plug.. will take a picture and share .. noticed the same experience in the other regions running a 95 RON on the forum.. where about 15 000 mile the plugs give a prob .. funny also plug 1 .. challenge to change the plugs is not a 5 min jobie..and with the Turbo .. will Toyota support me ?

Good word for the Athlone Toyota team .. replace my plugs just paid for the plugs.. all well and the car is running good now.. Must get it back to Dino as she spins now hard in 2nd .. so I am sure I gained a lot in KW by plug replacement.

Here with the plugs....left is no 1... That gave the misfire.

That plug certainly does not look good.
What was the cause of the failure?

Not sure but seems to be common running 95 ron notice this from other regions aswell. Must be tunning and bad petrol.

Ouch, the scary part is - where did the rest of the plug go?