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Ethanol fuel / unleaded
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Old 27 Oct 2014, 04:03 PM   #1 (permalink)
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Ethanol fuel / unleaded

I have a standard stock 2007 Subaru Impreza 2litre non turbo. No modifications etc. I have had issues lately with fuel. I have usually used E10 fuel no problems but now I'm getting very rough idles and sometimes loss of power when driving for a few seconds. If I fill up with 98 octane it's very good.
Can subarus be run on e10? I've been told there is no issue but if this issue that I have resolved itself then I would say there is a problem.
What fuel would people recommend - I prefer not always to full with 98 octane but could fill with 95 octane - not as expensive.
I've heard running on premium fuels does nothing if your cars not tuned to premium which it isn't.
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Old 28 Oct 2014, 12:57 AM   #2 (permalink)
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Re: Ethanol fuel / unleaded

none turbos can use 95 octane. E10 has a slightly lower octane of 94 and if your lucky it will be 95. Even though this link is Australian it does explain a few different fuels click here

There is nothing wrong with putting 98 octane in the tank, its a cleaner fuel, I've used it a 1.2 engine and noticed it was more responsive as it's got cleaning agents in it.
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