Category Archives: E10

E10 is a specially formulated regular unleaded petrol blended with up to 10% renewable ethanol.

Ethanol in petrol – is it ok for my car?

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This is the second blog in our series on Fuels.  In the first blog we looked at premium fuels, now we take a look at ethanol in petrol (E10 and E85).

ethanol in petrol

Does an ethanol petrol blend affect the performance of your car?

E10

E10 is standard unleaded petrol (ULP) with 10% ethanol added. From 1 July next year (2012) standard unleaded petrol will no longer be available in NSW and will be replaced with E10. This strategy is endorsed by the NRMA Board and aims to encourage the take-up of ethanol – which is locally produced and reduces Australia’s dependence on fossil fuels.  Straight unleaded is now getting harder to find.

Vehicles built pre-1986, some post-1986 vehicles, most small engines such as chainsaws and whipper-snippers and most Japanese motorcycles are recommended NOT to use ethanol. These vehicles and power tools will have to use premium petrol when ULP becomes unavailable.

Motorists whose vehicles cannot use ethanol should be aware that all petrol distributed by United contains ethanol except its Premium 98. View a list of all petrol grades available in NSW.

The octane of E10 is commonly 93-94, so motorists whose vehicles are specified for 95 octane fuel should be cautious using E10. If you want to try E10 check that there are no unusual noises like rattling or pinging under acceleration, which is a sign that the octane is too low.  United claims its E10 is 95 octane.

Check whether your vehicle is suitable to use an ethanol petrol blend.

A refuel of 50 litres at a price difference of 10 cents a litre between E10 and premium would cost an extra $5.   But this has to be kept in perspective with the overall cost of running a vehicle.

E85

You should not use E85 in any vehicle that is not designed for it. The only cars designed for E85 are the current model Holden Commodores that are so marked and the Saab Biofuel range.  For other vehicles, check the recommendation in the owner’s manual or check with the dealer or manufacturer and adopt their recommendation.

In our next blog, we’ll take a look at Diesel.

Do you use an ethanol petrol blend in your car? What affect has it had on your car’s performance and reliability?

Petrol grades currently available in NSW*

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Company Fuel Name Research Octane Number – RON
Description
7 Eleven Unleaded 91 91 ULP – Unleaded Petrol
Premium unleaded 95 95 Premium
Premium unleaded 98 98 Ultra Premium
Unleaded E10 93-94 ULP +10% ethanol
Diesel N/A Diesel
BP Unleaded 91 91 ULP
Unleaded 95 95 Premium
BP Ultimate 98 Ultra Premium
e10 Unleaded 93-94 ULP +10% ethanol
Diesel N/A Diesel
Shell/Coles Unleaded 91 ULP
Premium 95 Premium
V-Power 98 Ultra Premium
Unleaded E10 93-94 ULP+10% ethanol
Diesel 10 N/A Diesel
Caltex/Woolworths Unleaded 91 ULP
Vortex 95 95 Premium
Vortex 98 98 Ultra Premium
E10 unleaded 93-94 ULP+10% ethanol
New Generation Diesel N/A Diesel + 2% biodiesel
Bio B5 N/A Diesel + 5% biodiesel
Bio B20 N/A Diesel + 20% biodiesel
E85 100+ ULP + up to 85% ethanol
United Petroleum Plus ULP 95 ULP+10% ethanol
Boost 98 98 Premium +10% ethanol
Premium 98 98 Ultra Premium
E85 (only available in Rozelle) 100+ ULP+ up to 85% ethanol
Diesel N/A Diesel
Liberty Unleaded 91 ULP
e10 Unleaded 93-94 ULP+10% ethanol
Premium unleaded 95 Premium

*not all available at all sites

Fuels – which should you use?

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petrol pump

Which premium unleaded fuel do you find the most efficient and cost effective?

Motorists can be forgiven for being confused about the fuels available and what their car needs.  There are five types of petrol now available (standard unleaded, 95 premium, 98 ultra premium, E10 and E85) as well as Diesel and LPG.

This blog is the first in our series on fuels to help clear up the confusion about which fuels are the best to use. We begin with premium unleaded.

Premium Fuels – is there a benefit?

Petrol vehicles are designed for a specific octane fuel and normally do not benefit from using higher octane fuel.

If the manual says you can use more than one type of petrol or blend, you may get the advantage of reduced fuel consumption (but only if your vehicle’s engine automatically adjusts its parameters to take advantage of higher octane).  Conversely, you may be able to save money by using a lower octane fuel, if the manufacturer states the vehicle will run normally on it.

As a rule of thumb:

  • 95 premium can give around 4% lower fuel consumption than 91, assuming the engine computer adjusts to take advantage of the octane difference.
  • 98 might give 3% reduction over 95, again assuming the computer adjusts the engine parameters.

The overriding recommendation is to consult the owner’s manual for your vehicle and use fuel of the octane listed.  Some motorists report lower fuel consumption using higher octane fuel.  If you wish to check this for yourself, be sure to record your fuel consumption for at least 10 tanks before you make the change, so you have a good baseline.  Try and check your baseline under normal conditions – if you have an unusual country trip in the middle of your test period, for instance, it will result in atypical figures.  Conversely, if your driving is normally on highways, a week of city driving will bias your figures.  Then change to the higher octane fuel and do a check for the next 10 tank fills and compare the figures.  If the savings from any reduced fuel consumption are outweighed by the extra cost of the premium fuel, it is obviously not economically sensible to use the higher octane.

In our next blog, we’ll look at ethanol in petrol (E85 and E10).

Which premium unleaded fuel do you find the most efficient and cost effective?

Unleaded petrol now phased out in 2012

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The NSW Government has recently extended the phase-out date of standard unleaded petrol (ULP) to 30 June 2012 (previously 30 June 2011).  This was in response to a possible shortage in supplies of ethanol.  This means that ULP may remain available well into 2012.

Before using E10, vehicle owners must check if an ethanol blend is suitable for their vehicle – this information can be found in the owner’s manual, by contacting NRMA Motoring Advice and on the Federal Chamber of Automotive Industries website.

For cars that cannot use E10, premium-grade unleaded petrol without ethanol will continue to be available.

Our May 2010 blog post about unleaded petrol contained several comments that owners found their vehicle had much higher fuel consumption when using E10 compared with ULP.  If your vehicle is in good condition you should not experience much more than the theoretical 3% increase in fuel consumption.

However, if you try E10 and experience an unusually high impact on fuel consumption, here are some possible causes and things you can do about them:

  • Was there water in your fuel tank from earlier contaminated petrol?  If so, the E10 will take the water into solution and your car may run roughly until the first tank of E10 is used up.
  • Is your fuel filter clogged?  Ethanol is a powerful solvent and may loosen residues in your fuel system.  Try changing the fuel filter after the first couple of tanks of E10.
  • Is your ignition system in good condition?  A slightly misfiring spark plug may be exacerbated by E10 leading to a severe misfire and increase in fuel consumption.  If you feel your vehicle is running roughly, have your vehicle serviced if it has not been done recently.
  • Is there an engine check or warning light showing on your dash?  Your engine management system and fuel injection system need to be in good condition.  Modern vehicles are designed to monitor oxygen in the exhaust and should be able to adjust to E10.  However a malfunctioning oxygen sensor or other component may mean that your vehicle is not achieving this.  Have your vehicle serviced if it has not been done recently.

What has been your experience with using E10?  Does the extension of the phase-out date of ULP help you?

Unleaded to be phased out in 2011

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Many motorists are still unaware that 91 RON unleaded petrol is to be phased out in NSW by 1 July 2011. Its place will be taken by the existing E10 ethanol blend.

In February 2007, the State Government made several commitments “to promote renewable biofuels in New South Wales.” Part of that commitment was to introduce an E10 mandate, which implies that all regular unleaded petrol sold in NSW from 1 July 2011 will contain 10% ethanol – specifically, from that date, “a primary wholesaler must not sell regular unleaded petrol unless the petrol is E10.”

Many service stations across the state are already not selling 91 RON. Before using E10, vehicle owners must check if an ethanol blend is suitable for their vehicle – this information can be found in the owner’s manual, by contacting NRMA Motoring Advice or on the Federal Chamber of Automotive Industries website.

For cars that cannot use E10, premium-grade unleaded petrol will continue to be available.

What are your thoughts on E10? Will you use E10 or switch to a premium-grade unleaded petrol?