91 vs 95 RON - Solved

[Mick2222]

Solved - Thank you for your assistance.

Mick

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I have a 2010 2-litre Corolla Ultima.

Can I upgrade the fuel from 91 RON to 95 RON?

Do I have to change anything?

Price aside, are there any advantages/disadvantages in upgrading from 91 to 95 RON fuel?

Mick.

Edited May 22, 2012 by Mick2222

[SuperDave]

Yes, you can change the RON fuel you put in. The 91 octane fuel is usually considered lower quality by many people, whether it actually is or isn't I wouldn't know. The best fuel to use is what is recommended in the manual in the glovebox.

[ben yip]

95 and 98 got cleansing agent.. 91 with ethanol is not completely burn, residue will remain in engine in the long run

I will say use 95..

However, you can buy those cleansing agent for 10-20 bucks per bottle in supercheap

[jeffy]

i use 95, you get more mileage, and use fuel doctors from supercheap

[Andrew357]

95 and 98 got cleansing agent.. 91 with ethanol is not completely burn, residue will remain in engine in the long run

I will say use 95..

However, you can buy those cleansing agent for 10-20 bucks per bottle in supercheap

Could you be any more incorrect about ethanol blended.fuels?

http://www.biofuels.nsw.gov.au/biofuels_faq/e10_fuel_economy

Ethanol blended.fuels burn better than a non blended fuel leaving less behind and also act as a cleanser on the fuel system. The downfall is that you may see a slight drop in fuel economy given ethanol has less energy than gasoline.

[123R-Prozak]

Run your car on what's in the manual, it's what it's tuned for

[aznjack26]

The higher the octane level the higher the flash point (blowing up)

Wouldn't recommend using E10 fuels which most 91 is always see heaps of corrosion on the fuel regulator intank.

I use BP Ultimate but octane can also help clean engines

So use either 95 or 98