Motoring Discussion > Subarus and Premium fuel Miscellaneous
Thread Author: Subariquet Replies: 10
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New Tue 23 Feb 10 22:27 
 Subarus and Premium fuel - Subariquet
Being a parsimonious type I've ony ever filled up 'cooking' petrol but for some reason I filled up with fancy stuff.

Is it better? It certainly feells like I've got more power available or am I getting a placebo effect?
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New Tue 23 Feb 10 22:30 
 Subarus and Premium fuel - rtj70
If you mean a higher octane petrol then the car should have sensed this and therefore changed ignition etc and ran better. Only performance engines are likely to do this.
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New Tue 23 Feb 10 22:33 
 Subarus and Premium fuel - Subariquet
How long would it take for this sensing to take effect? It seemed to be fairly soon after filling up but I was close to empty when I filled up.
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New Tue 23 Feb 10 22:39 
 Subarus and Premium fuel - rtj70
I would have thought close to instant. What engine you got. Is it a Subaru boxer. If so you would not have got best performance on normal 95 octane unleaded. The VAG direct injection engines like the 2.0T needed 98 octane really.
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New Tue 23 Feb 10 22:45 
 Subarus and Premium fuel - Subariquet
2.5 Boxer. It did feel pretty much instant but I dismissed it as me imagining it. I must say I don't think I'll go back to the cheaper stuff now.
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New Tue 23 Feb 10 22:49 
 Subarus and Premium fuel - rtj70
My first time in a Subaru Imprezza was a colleagues at work company car. He had a fuel car so always used the 98 Octane stuff. Normal 95 Octane was not recommended and it blunted performance.
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New Tue 23 Feb 10 22:55 
 Subarus and Premium fuel - Fenlander
Somewhere on youtube there is a motoring program rolling road test where it showed a Subaru was very good at adapting to the better fuel and gaining 15-25bhp.. something like that.
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New Tue 23 Feb 10 22:58 
 Subarus and Premium fuel - rtj70
I think even something like the higher performing VAG turbos need 98 octane. They used to. Lower Octane reduced both power and mpg.
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New Tue 23 Feb 10 23:04 
 Subarus and Premium fuel - Zero
You dont buy a Doberman and feed it on milk do you. It needs blood.
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New Tue 23 Feb 10 23:39 
 Subarus and Premium fuel - Fenlander
Here it is...

www.youtube.com/watch?v=dDHwCWdrtdg&feature=related
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New Wed 24 Feb 10 08:11 
 Subarus and Premium fuel - Netsur
Certainly the Outback felt just that little bit sharper on V-power, but not enough to make it worthwhile buying all the time. Economy was no different but I did use f I was going on a long run to get the double whammy effect of a good clear out of the engine by a long high sped run coupled with good fuel.
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