United 100 Octane fuel

[orkers]

Has anyone tried the new 100 Octane petrol being sold at United petrol stations? It has up to 10% ethanol but wondered whether it would be a good alternative to BP Ultimate / Shell V-Power at a slightly cheaper price?

I might give it a go this week and see how it goes.

[Diesel_vert]

Has anyone tried the new 100 Octane petrol being sold at United petrol stations? It has up to 10% ethanol but wondered whether it would be a good alternative to BP Ultimate / Shell V-Power at a slightly cheaper price?

I might give it a go this week and see how it goes.

Seeing how all current petrol models are compatible with 10% ethanol (see link), I don't see why not.

Ethanol can be a double-edged sword when it comes to value. It's a cheaper commodity than petrol, which lowers the price at the pump, but its lower energy content also means you consume it at a higher rate. So you may not save any money in the long term.

However, you can't argue with its performance. Ethanol tends to cool the intake charge, and combined with the two point increase in octane, your engine will be able to produce more power if it can take advantage of it.

I tend to judge fuel by it's octane number and not price, so it's a no-brainer for me - use it!

Others may have different priorities (like running costs, etc) but then who buys an R for that?

My only problem is that it's not available in Sydney.

[pologti18t]

I used it on a recent trip to Melb in a Polo GTI with APR. The car loved the stuff ,especially in the mountains. Fuel economy didn't dramatically change.

[MariusGT]

My only problem is that it's not available in Sydney.

United Dee Why has it.

might fill my next tank and see how it goes..

[Brendan_A]

United Dee Why has it.

might fill my next tank and see how it goes..

Report back with your thoughts if you use it.

[Bflat]

Ok, so I'm on to my second successive tank of this brew and so far so good.

Economy: My last tank included a round trip to little river and back and I found my L/100KM slip all the way down to 6.7 at one point and I managed a total of 450km which is better than usual.

Performance: Hard to tell, but still it's ferocious self. In no way is it diminished.

Convenience: Luckily I have a United 5 mins from me (Eltham) and I filled up at another one (The Pines/Doncaster) on the way home yesterday. They're by no means abundant, however I've had a tougher time finding a BP at the best of times.

Overall: I'll still use it and report back accordingly. It appears it lasts well enough for me to get good mileage by driving like a grandpa and when the fancy takes me the combustion well and truly allows for a spirited gallop.

I've still got no idea how the Ethanol comes into play though

[Peter Jones]

My V6 Bora likes it. Seems to go a bit better on the 100.

I wouldn't run it in the MK1 racer though because of the metal tank and rust issues.

[brad]

Has anyone tried the new 100 Octane petrol being sold at United petrol stations? It has up to 10% ethanol but wondered whether it would be a good alternative to BP Ultimate / Shell V-Power at a slightly cheaper price?

I might give it a go this week and see how it goes.

It's been out for a few years.

Sent my fuel consumption sky-high. You'd be better off using e85 (110octane?) and getting a tune to suit. All the cool kids are doing it.

[clicht]

how mucyh do you pay for your e85

[brad]

how mucyh do you pay for your e85

I'm not a cool kid but it's ~20c/L cheaper than ULP92.

a mate in QLD runs an E85 tune on his Liberty GT. Pulls some very nice hp & torque figures but he changed injectors (the stock were maxxing out all the time), fuel pumps, fuel lines, etc & did a lot of custom tuning.

One problem is that E85 isn't consistently E85. The level of ethanol varies quite markedly.

[Diesel_vert]

I've still got no idea how the Ethanol comes into play though

Ethanol is more naturally resistant to knock, so when it's mixed with petrol, it effectively increases the overall its octane number. This means the engine can produce more power if it's able to take advantage of it.

However, when used in a conventional petrol engine, fuel consumption increases because ethanol is less energy dense than petrol; meaning you have to burn more of it.

But if one were to build an engine designed to run on ethanol from the outset, you'd be able to achieve very high efficiencies indeed.

A mate in QLD runs an E85 tune on his Liberty GT. Pulls some very nice hp & torque figures but he changed injectors (the stock were maxxing out all the time), fuel pumps, fuel lines, etc & did a lot of custom tuning.

Yep.
It would be wise to make the necessary modifications to ensure the engine, and its auxiliary systems, is compatible with fuels of high ethanol content.

[MariusGT]

Report back with your thoughts if you use it.

Ok. filled with 100premium from united before easter weekend. 50+ Litres so only a dash of the 98 left over to mix.

With a bit left i'm looking at getting around 670-680kms from the tank. Now considering i normally get around 650 with majority city driving on a weekly basis.. this long weekend included a run to Nelson Bay and back (around 400kms of freeway). So economy is certainly NOT better than 98 from shell, BP etc.

As for the main question about noticeable power gain: seat of my pants? bugger all. if any it is due largely to the fact i know i have 100 in the tank and THINK it feels quicker. Without proper timing i couldn't say either way.

Verdict: i know it's not an extensive test having only done 1 single solitary tank... but i'm never filling with United 100 again.

I'll stick to BP.

[readerr0r]

I've been running 100Oct in my Polo since I bought it because there's a United near where I live and I love it.

I got a BP gift card from my credit card rewards and filled up with BP 98 at a rather old service station in Annerly (Fuel gauge was in the red) and a few days later it actually misfired on the highway and shutdown a cylinder. My tailpipe had a bunch of soot too.

Now I know it was mostly likely the crappy servo complete with 80s style pumps that was the cause but if there's a United near where you live I say go for it. The Myer rewards bonus is alright too

[ongti]

This is my 4th tank of United 100...about 10 min from my house but My car loves it and im loving it too with APR stage 2 the car is getting 600km out of a full tank... very impressive

[Tobes_WIR35]

This is my 4th tank of United 100...about 10 min from my house but My car loves it and im loving it too with APR stage 2 the car is getting 600km out of a full tank... very impressive

Does anyone know if/where I could get the maximum volume flow rates for the stock Mk6 GTI fuel system? I've heard that running E85 fuel gives you anywhere from 10-25% more power, but of course you need to tune it for around 106RON and it also needs about 25% more fuel. It would be cool to do, but I don't think that there would be 25% redundancy in the stock fuel system to deliver this amount of fuel.