United Petroleum Premium 100 - Suitable For R34's?

[xntrq]

Hey guys, I was rolling past the Hume Hwy and noticed Premium 100 from United. Has anyone used this before and/or is it suitable for a R34 25GT (RB25DE)?

[Cowboy1600]

It's fine. But unless it's the only fuel available, there's no point in using it.

91 all the way for a DE. There will be little to no benefit running 98 or 100 ron fuel.

[mad082]

+1 for the above. no point wasting money on higher octane fuels. if you want higher octane then run an E10 that is 94/95 octane as it won't cost you any extra

[luke gtr]

The 100 octane united is 10%ethanol.

Saw or on the sign when i was there last.

[xALmoN]

isn't the DE a 10:1 compression ratio engine?

minimum 95 for that

[Miguelone]

Yeah you want higher octane, makes a lot more difference on a hi comp na engine.

[Cowboy1600]

10:1 is hardly high compression.

A 2ZZ-FE in a base model Corolla is 10.0:1 and requires 91 only. A Lancer VR-X is 10.5:1 and only requires 91. XT Falcon, 10.3:1 and only requires 91.

I'm not sure what makes the 25DE require higher RON fuel?

[Tai1or Made]

Aren't the tuned for the use of Japans fuel?

Which is higher in octane than here?

[iamhe77]

"Requires" and "runs best on" are two very different things though.

My VQ35de Stagea is 10.3:1 comp and requires a minimum of 95 although I will only be using the United 100 (and maybe a 98 every now and then).

The Wife's 380is 10.0:1 and "requires" only 91, but I can tell you that there is a massive difference when you run 95 and then an even larger jump when running 100 (as per the timing advance and engine load display via Torque on my phone).

[Cowboy1600]

Aren't the tuned for the use of Japans fuel?

Which is higher in octane than here?

They are the AU delivered ones, and of course a Falcon. They require 91 RON that we get here.

[Cowboy1600]

"Requires" and "runs best on" are two very different things though.

My VQ35de Stagea is 10.3:1 comp and requires a minimum of 95 although I will only be using the United 100 (and maybe a 98 every now and then).

The Wife's 380is 10.0:1 and "requires" only 91, but I can tell you that there is a massive difference when you run 95 and then an even larger jump when running 100 (as per the timing advance and engine load display via Torque on my phone).

I think you'll find it's mostly placebo affect.

Most ECUs don't have enough scope for self tuning to make any user of higher RON fuel. Note, I said most. I'd be surprised if an RB25DE could.

[iamhe77]

I too would be surprised if the RB25de ecu could make use of the higher octane fuel, but no harm in using a better fuel for a couple of bucks per tank IMO.

No placebo effect with regards to the two cars listed above (particularly the 380 - cleaver little ecu that one) although I am talking about 2005 ecu's as opposed to a late 90's ecu.

[iseekool]

RB25DE on an R34 requires minimum of 95RON - Says on the manufacturer's brochure and on the manual. But if you need emergency fuel, I can't see any reason why 91 would cause major issues for short term use.

Oddly enough I still get some pinging on 95 and throttle response is not as crisp

I always fill 98 myself - No pings and better economy. But I must stress the price of 98 will not make it cheaper to run vs. running 95.

Filling up with 100 or higher is a waste imho.

I believe by filling 98 you will be hitting the limits of the stock ECU and sensors - Filling 98 just guarantees you are definatly well within the 95+ range.

[iamhe77]

United 100 is the same price as BP/Shell/Caltex/Mobil 98

[iseekool]

United 100 is the same price as BP/Shell/Caltex/Mobil 98

Fair enough.

I was thinking back to when Shell released V-Power 100.

[mad082]

Aren't the tuned for the use of Japans fuel?

Which is higher in octane than here?

pretty sure their base fuel isn't any higher than here, they just have a premium fuel that is higher than what we have here. so they still have 91 octane fuel over there.

[xntrq]

Ah well. 98 it is then. I'm led to believe ethanol is bad for your motor right?

[scotty nm35]

Petrol is bad for your motor, not ethanol. lol.

[Tai1or Made]

pretty sure their base fuel isn't any higher than here, they just have a premium fuel that is higher than what we have here. so they still have 91 octane fuel over there.

Ahhh ok.

Marc, you really need to stop posting useful shit.

[mad082]

Ahhh ok.

Marc, you really need to stop posting useful shit.

sorry brah. i'll just go back to wasteland