98RON UPULP generally costs up to 50c per-litre more than E10 so it can be an expensive way to fill your car for very little performance gain, although there are benefits with no ethanol content meaning it is safe to use in all petrol cars, and can help protect the engine on very hot days when there is a risk of poor ...
Premium unleaded 98 octane petrol: This petrol is designed specifically for high performance engines. This will definitely work if your car needs premium fuel, and may offer better mileage over 95 octane fuel. E10 fuel: This blend of ethanol and unleaded fuel is cheaper than 98 octane and has an RON of 105.
The Federal Chamber of Automotive Industries says some E10 unleaded petrol blends are marketed as 94 RON. That means they do not meet the fuel standards for cars recommended to use 95 or 98 premium fuels. Your car's handbook should tell you if you can or can't use E10.
Can I mix E10 and regular unleaded? Not like diesel and petrol, you can refuel with E10, regular or premium unleaded without any damage to the fuel system or engine.
Ethanol has lower energy content than petrol, so generally speaking it provides less 'bang for your buck'. ABMARC says this means that you probably won't drive quite as far on a tank of E10 as you would on a tank of unleaded (91 RON) or 95 RON.
The problem with E10 is it contains less energy than petrol, so E10 burns quicker than premium unleaded (95 and 98 octane).
What is the octane rating of Shell Unleaded E10? Shell Unleaded E10, which contains up to 10% ethanol, has a minimum 94 octane rating.
It is believed that the higher bioethanol content in E10 petrol could dislodge deposits in older engines and fuel systems, causing blockages; it could also cause some seals, gaskets, metals and plastics to corrode.
Premium, 98 Unleaded Petrol
Otherwise known as Ultra-Premium by some brands, 98 is the highest-octane fuel currently available in Australia. Unleaded 98 provides higher engine power and overall performance in comparison to 91 and 95. It is also responsible for less pollution, according to providers.
Using 98 might give 3 per cent reduction over 95, again assuming the computer adjusts the engine parameters. But fueling an engine with 95 or 98 won't necessarily open the door to earth shattering performance or extreme levels of fuel economy if the engine is not specifically designed to run on it.
What is E10 fuel? As you might have guessed from the name, E10 is an unleaded petrol made up of 90% regular unleaded and 10% ethanol. 10% ethanol can be added to mineral gasoline to give either 95 RON or 97/98 RON fuels.
Although E10 is cheaper at the pump, it will burn quicker than your premium fuels. This is due to the higher octane rating of premium fuel (Unleaded 98) compared to E10 (Unleaded 91/94).
Most petrol vehicles built after 2000 are compatible with E10. If your car is E10 compatible you can replace your unleaded petrol with E10 when you fill up. It's ok to switch back and forth between E10 and other unleaded fuel types, where your manufacturer has advised these fuels are suitable for your vehicle.
E5 petrol is made up of 95 per cent unleaded petrol plus 5 per cent ethanol (which is why it's named 'E5'). E10 petrol is much more beneficial to the environment, containing 10% ethanol and 90% regular unleaded petrol – and was introduced to help the government meet its climate change targets.
bp Ultimate Unleaded is our most advanced performance petrol with a minimum octane number of 98 and an innovative formulation that cleans away the harmful dirt in your engine and helps stop it coming back.
Ongoing use of 98-octane fuel, with the increase in cleaning agents, will help to reduce carbon build-up on the engine's valves and injectors.
Because the energy provided by the ethanol is less than the energy provided by pure petroleum, E10 has around 3% less energy than the equivalent amount of RON 91 petrol.
Mixing the 95 and 98 octane fuels will not cause any problems.
Mixing the grades to get 91 or so shouldn't hurt, but it probably isn't saving you much money. Using anything higher than your manual recommends probably won't help your car's performance – but using lower might save you a few bucks, Leroux says. If you notice knocking, you should switch back.
E10 petrol's higher bioethanol content is corrosive to rubber parts, gaskets, seals, metals and plastics, which causes engine damage, so it could dislodge deposits in older engines and fuel systems, causing blockages. It should only be used with expert advice, which means pretty much never.
Surprisingly, E10 isn't exactly a gasoline alternative but rather a chemical innovation that makes regular fuel cleaner.
Why could E10 damage my classic car? It's all down to that double dose of ethanol. Ethanol is hygroscopic: it attracts water and absorbs moisture from the air, causing condensation and, in the long-term, the corrosion of car parts like carburettors, fuel lines and fuel tanks.
For example, putting regular unleaded 91 RON in a car designed for the higher-octane 95 RON or 98 RON could result in knocking in the engine. You may hear unusual sounds or experience a less smooth drive, and in the long run it could diminish fuel economy.
E10 Unleaded is a mixture of Ethanol and regular 91 Octane unleaded petrol.
98 petrol can withstand this, allowing the engine to extract the maximum amount of power from the fuel and run at top power. If you used 95 petrol instead, it would explode too quickly under the pressure.