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[JamesV6CDX]

Both of these have a lower calorific value than 95 RON petrol so I wouldn't find it surprising if fuel economy was worse on an Omega.

It's horses for courses. No point in using high octane fuel if the engine doesn't need it.

Based on personal experience, I would agree with Kevin - I've never had any advantage with high-octane fuels in the Omega....

[Kevin Wood]

You seem very knowledgeable about fuel.

I tend to fill with a supposedly superior fuel every 5 or 6 re-fuels.  Is this a waste of time, or can it assist in the general condition of the engine?

The better fuels do claim to have additives to keep the fuel system clean. Running them every so often, or just adding a bottle of injector cleaner periodically, will never do any harm.

Kevin

[Broomies Mate]

The better fuels do claim to have additives to keep the fuel system clean. Running them every so often, or just adding a bottle of injector cleaner periodically, will never do any harm.

Kevin

Thanks Kevin.  Do you recommend any particular Injector Cleaner?  What sort of usage interval would you suggest?

Sorry to OP for thread Hi-Jack.

[Tony H]

Every time I use High Octane Fuel, I feel I get lower MPG (as opposed to standard, cheap 95 ron).

Anyone had any similar or different experiences?

My view is that premuim fuels in Omega are pointless - apart from maybe the odd tankful for the cleaning properties...

Certainly don't get increased MPG or performance...

I hope there is some weight to your theory, as I brimmed the tank with Super Unleaded from Esso (from empty tank) and now I'm averaging 11mpg (if the computer is right).

I do have a heavy foot though.

[Markjay]

The better fuels do claim to have additives to keep the fuel system clean. Running them every so often, or just adding a bottle of injector cleaner periodically, will never do any harm.

Kevin

Thanks Kevin.  Do you recommend any particular Injector Cleaner?  What sort of usage interval would you suggest?

Sorry to OP for thread Hi-Jack.

I would go for Redex, every time... been using it for many years (until I switched to high octane fuels which already have the detergents), and I found that the injectors were always looking like new - i.e. no deposits etc - so it must be doing what it says on the tin...

[VXL V6]

Forte specialist injector cleaner 

[Jimbob]

I use forte advanced formula gas treatment....

an idea of results is here :

http://www.omegaowners.com/forum/YaBB.pl?num=1258052938/0#0

[Blackie_No1]

Realistically you will need at least 3 fills of Super or similar before you will notice any difference as the fuel system will still hold a lot of the oridnary stuff in the lines, filters injectors etc...  It doesnt get rid of it on the first  run through as everything will be coated in it.

When I drive sensibly the tank lasts longer on super and when I drive with the heavy foot there is a smoother pull right through the rev range, haven't had her on a rolling road so cant comment on any power difference.