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Date: Mon, 10 Oct 2005 16:16:22 GMT
From: David Taylor <djtaylornospamoot.com>
Subject: Re: Premium vs. regular unleaded?


> What would happen if I ran my 2002 9-5 Aero on regular unleaded, instead of > premium? I run my 9000 Aero on 95 RON all the time. I don't drive it hard all the time, in fact rarely give it full welly for prolonged duration so there's not much benefit of burning tanks worth of anti-knocking fuel while pootling about! > My wife thinks it will save us money. I'm concerned it could cause damage > to the engine, or at the very least cause enough power drop that you'd lose > the cost savings. I don't believe you'll notice any difference to be honest, only perhaps in the cost at the pump. > Then let's extend the question to her car: she has a 1984 Porsche 911. > It's supposed to have premium, and it doesn't have the fancy electronics > that my 9-5 has. What happens if she feeds HER car lower-octane fuel? With a manually set ignition system, it can't retard when knocking is detected so it's not a good situation. David.

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