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  #1483347 2-Feb-2016 10:38
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BTR: Its amazing the amount of people that don't understand which petrol they should be putting into their cars. I've come across so many people that use 91 because its the cheapest.

 

Using the wrong fuel can damage your engine and actually give you worse mileage than using the correct fuel.

 

While that is true, most cars sold or imported into NZ will work perfectly on 91 (or less) octane fuel, and for those cars, going to a higher octane rating is literally just throwing money away and in fact will result in (ever so) slightly worse mileage.

 

Only some euro's and high performance cars genuinely need higher octane fuel. Octane rating is about ignition profile and resistance to knock, not about power/energy/cleanness of fuel as many people think. In fact higher the octane, the less 'bang'. Most reasonably modern cars that will 'knock' on lower octane rated fuels will adjust timing to compensate, preventing any damage at the cost of economy. All the ads on TV about getting better mileage on higher octane fuels are really only true if your car is adjusting timing to prevent knock.

 

 

 

 





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  #1483348 2-Feb-2016 10:41
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networkn:

 

I paid $0.69c for Diesel in Auckland last night, a week ago I paid $59c with a discount coupon. I managed to get Auckland - Taupo, Rotorua, Hamilton, and back to Auckland on my tank, which was awesome considering it's a Twin Turbo!

 

 

 

 

Twin turbo doesn't always mean more fuel! With VTG and other technologies they are way more efficient. Anyhow a diesel turbo is much more economic than a non turbo and a petrol.

 

How ever, My Audi was "Bi turbo" and used a lot of fuel, Over 25L/100KM on an average day.

 

 


 
 
 
 


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  #1483350 2-Feb-2016 10:42
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ajobbins:

 

BTR: Its amazing the amount of people that don't understand which petrol they should be putting into their cars. I've come across so many people that use 91 because its the cheapest.

 

Using the wrong fuel can damage your engine and actually give you worse mileage than using the correct fuel.

 

While that is true, most cars sold or imported into NZ will work perfectly on 91 (or less) octane fuel, and for those cars, going to a higher octane rating is literally just throwing money away and in fact will result in (ever so) slightly worse mileage.

 

Only some euro's and high performance cars genuinely need higher octane fuel. Octane rating is about ignition profile and resistance to knock, not about power/energy/cleanness of fuel as many people think. In fact higher the octane, the less 'bang'. Most reasonably modern cars that will 'knock' on lower octane rated fuels will adjust timing to compensate, preventing any damage at the cost of economy. All the ads on TV about getting better mileage on higher octane fuels are really only true if your car is adjusting timing to prevent knock.

 

 

 

 

 

 

 

 

I told off a guy at Gull for 2 things.

 

Putting 91 into a new RS4 and using Gull.. (Ethanol blending reasons)


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  #1483352 2-Feb-2016 10:43
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TimA: I told off a guy at Gull for 2 things.

 

Putting 91 into a new RS4 and using Gull..

 

Don't Gull also mix ethanol into their fuel? That is another false economy.

 

Edit: I see you added the ethanol comment. Yes, ethanol is a waste of money at best, and will genuinely damage some engines not designed to handle it.





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  #1483357 2-Feb-2016 10:55
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1.529 in some places in Auckland while others are 1.829

 

 


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  #1483375 2-Feb-2016 11:04
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Caltex in Auckland are also very bad for having higher prices on 95. They will have 91 for 1.529 and 95 for 1.729, where as shell, mobil and BP will have 95 for 1.629.

 

guess it comes back to covering there margins on the cheaper 91


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  #1483377 2-Feb-2016 11:06
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ajobbins:

 

BTR: Its amazing the amount of people that don't understand which petrol they should be putting into their cars. I've come across so many people that use 91 because its the cheapest.

 

Using the wrong fuel can damage your engine and actually give you worse mileage than using the correct fuel.

 

While that is true, most cars sold or imported into NZ will work perfectly on 91 (or less) octane fuel, and for those cars, going to a higher octane rating is literally just throwing money away and in fact will result in (ever so) slightly worse mileage.

 

Only some euro's and high performance cars genuinely need higher octane fuel. Octane rating is about ignition profile and resistance to knock, not about power/energy/cleanness of fuel as many people think. In fact higher the octane, the less 'bang'. Most reasonably modern cars that will 'knock' on lower octane rated fuels will adjust timing to compensate, preventing any damage at the cost of economy. All the ads on TV about getting better mileage on higher octane fuels are really only true if your car is adjusting timing to prevent knock.

 

 

 

Both my old and new Focus both need 95. They both run horribly on 91. In Europe 95 is the standard Fuel so most Euro engines are designed for 95 or greater.

 

 


 
 
 
 


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  #1483384 2-Feb-2016 11:08
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ajobbins:

 

BTR: Its amazing the amount of people that don't understand which petrol they should be putting into their cars. I've come across so many people that use 91 because its the cheapest.

 

Using the wrong fuel can damage your engine and actually give you worse mileage than using the correct fuel.

 

While that is true, most cars sold or imported into NZ will work perfectly on 91 (or less) octane fuel, and for those cars, going to a higher octane rating is literally just throwing money away and in fact will result in (ever so) slightly worse mileage.

 

Only some euro's and high performance cars genuinely need higher octane fuel. Octane rating is about ignition profile and resistance to knock, not about power/energy/cleanness of fuel as many people think. In fact higher the octane, the less 'bang'. Most reasonably modern cars that will 'knock' on lower octane rated fuels will adjust timing to compensate, preventing any damage at the cost of economy. All the ads on TV about getting better mileage on higher octane fuels are really only true if your car is adjusting timing to prevent knock.

 

 

 

 

 

 

Agreed. Spoke to the main dealer of our car (Holden Cruze 1.4 ITi Turbo) not long after we got it and asked if running it on 95 as opposed to 91 would make any difference. His answer, you'd have to be a monumental car nut to notice any difference in performance\economy. Although you would notice the dent in your wallet due to the higher price.

 

The only petrol I won't put in this car is the Mobil 91, due to the ethanol in it.

 

Around Johnsonville in Wellington BP & Z are 1.829, Mobil is 1.809 and the independent challenge was still 1.799


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  #1483392 2-Feb-2016 11:14
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Plenty of NZ new and import cars need premium 95/98 octane, not just Euro and not just performance cars.  With petrol direct-injection prone to carbon build-up on intake valves which is relatively expensive to fix properly (removal of manifolds and cleaning) even if the engine management system prevents knocking/pre-ignition damage, it's not worth the risk.  Don't assume that because the NZ new model is specified to run on regular that this means the apparently "same model" import is also specified to run on regular.  With many Euros, IIRC, they're specified for 96 RON.  Better to go for BP 98 RON IMO than "premium" 95 RON from other fuel companies.


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  #1483409 2-Feb-2016 11:31
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MikeB4: Yuck only 91, won't be using it.

 

 

 

What's wrong with 91... most modern engines are tuned for it.





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  #1483416 2-Feb-2016 11:38
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kharris:

 

MikeB4: Yuck only 91, won't be using it.

 

 

 

What's wrong with 91... most modern engines are tuned for it.

 

 

 

 

You shouldnt group modern cars by saying "Most"

 

NZ new cars will say the minimum octane you can use inside the fuel flap.

 

Never assume. Otherwise you make an "Ass of U and ME"


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  #1483425 2-Feb-2016 11:49
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I can only use 98 so only options are BP and Mobil (manufacture says only to use 95 as a last measure). Cant use Gull as it has Ethanol and manufacturer say no to that as well. cry Prices seem to be much higher with 98 as I was shocked at how much cheaper it was to fill up the wife's massive Commodore tank with 91.


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  #1483426 2-Feb-2016 11:50
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myopinion:

 

I can only use 98 so only options are BP and Mobil (manufacture says only to use 95 as a last measure). Cant use Gull as it has Ethanol and manufacturer say no to that as well. cry Prices seem to be much higher with 98 as I was shocked at how much cheaper it was to fill up the wife's massive Commodore tank with 91.

 

 

 

 

What vehicle is that?


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  #1483428 2-Feb-2016 11:51
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996


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  #1483429 2-Feb-2016 11:53
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myopinion:

 

I can only use 98 so only options are BP and Mobil (manufacture says only to use 95 as a last measure). Cant use Gull as it has Ethanol and manufacturer say no to that as well. cry Prices seem to be much higher with 98 as I was shocked at how much cheaper it was to fill up the wife's massive Commodore tank with 91.

 

 

 

 

My massive commodore take also likes 91 and the engine is designed to run on it even though it is a 6 litre V8.

 

91-octane is premium fuel... it is not low octane... other countries sell lower octane fuels (as low as 85)

 

What do you drive that requires 98?

 

 





Kirk

 


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