Big, Big Time Poster
New fuel
I just filled up with 'unleaded 95 plus' with 10% Ethanol. Supposed to be good for the engine. I'm in sydney so its all pretty new to us. BTW it was $1.24 a litre.
Grand Master
supposed to = isnt.
ethanol + older bmw engines dont play well, especially if you have a nikasil engine.
ethanol is corrosive to engine parts, has lower energy than gasoline, and lowers both horsepower and gas mileage.
your car will still run, just not the way you want it to.
2 Grand Master
Stay away from ethanol, if at all possible.
Lowered with blue h&r(?) springs, Bilsteins, tint, 19# design 3 injectors, Dual Magnaflow
southwest WA
Major Contributor
what's wrong?Originally Posted by Alexlind123
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2 Grand Master
I wont pretend to be an expert on the subject, but from what i understand ethanol gives your engine less power and makes the exhaust smell bad.
Lowered with blue h&r(?) springs, Bilsteins, tint, 19# design 3 injectors, Dual Magnaflow
southwest WA
Big, Big Time Poster
I can relate. It's exactly what happens to me after a few beers!!
Big, Big Time Poster
doesn't the ethanol allow the engine to have more a complete burn also doen't it cool your engine? I have never heard that ethanol is corrosive.
Major Contributor
I have heard that ethanol can have a negative effect on engines not designed for them, i.e. older cars. It makes sense, when E34s were designed ethanol wasn't used in gasoline. It's like the older cars that leak when synthetic oil is used in them, it's just not part of the design. Why take a chance?
Major Contributor
I heard that an upgrade to regular system for usage of ethanol gas would entail changing to stainless steel fuel lines...
deleted air conditioning
Grand Master
a 10% concentration in ethanol reduces gas mileage by about 20% in all E34 engines, making you use more foreign oil and spend more on gas.
ethanol is supposed to reduce carbon oxides when the engine is running rich, by allowing the non burned fuel to "burn" on its way to the cats using the ethanol as an oxygen substitute.
HOWEVER.. motronic 3 cant compensate for the lower energy content of the ethanol through ignition timing modification because it "appears" to the engine sensors to be running fine.
the engine management system in the Nissan 350Z and Murano run totally fine with 10% ethanol, but ours runs pretty rough and pathetic.
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