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Ethanol and your BMW




The recent addition of ethanol to gasoline in the US gasoline has sparked a lot of discussion among our customers. Since these issues are of common interest to many of our customers, BMW of Peabody wanted to take a moment to offer some suggestions for your 530ia.

What Is The Current Use Of Ethanol?
As you know, Ethanol is a fuel additive that, in the US, is usually made from corn. When burned, ethanol releases much less tailpipe emissions than gasoline, making it better for the environment. Because of that, ethanol is now being mixed with gasoline for auto fuel. This mixture can be from 10% all the way up to 85% (E85).

Will Using Fuel Mixed With Ethanol Harm My Vehicle?
Using a fuel that contains up to 10% ethanol will not harm your vehicle. However, there are a couple of things to be considered. First, under some conditions (usually low temperatures) ethanol separates from the gasoline-alcohol mixture and absorbs water. The ethanol absorbed water is heavier than gasoline or ethanol and settles at the bottom of the fuel tank. When introduced into the combustion process, this leads to an extremely lean fuel mixture and can result in misfires, rough idles, and cold starting problems.

Secondly, some materials commonly used with gasoline are not compatible with ethanol. When these materials come in contact with ethanol, they may dissolve in the fuel, which may result in poor drivability, or worse engine damage.

Please remember that fuels that contain more than 10% ethanol such as E85 are intended for specially prepared vehicles (flex-fuel vehicles). These fuels must never be used in BMW vehicles.

Will Using Ethanol Void My Warranty?
Using fuel that contains up to and including 10% ethanol will not harm your vehicle or void the applicable warranty with respect to defects in materials or workmanship. However, BMW does not cover damage caused by fuel containing more than 10% ethanol or by contaminated fuel.

What Can I Do To Protect My Vehicle?
There are a couple of important things you can do to protect the investment you've made in your BMW.

1. Purchase high quality fuel. Make sure that your fuel has a minimum octane rating of AKI 91 and the percentage of ethanol is 10% or less.

2. Purchase your fuel from a reputable source. BMW and several other auto manufacturers have worked with gasoline retailers to approve "TOP TIER Detergent Gasoline". These fuels have increased levels of detergent to help keep engines cleaner and reduce deposits-related concerns.

You can find out more about TOP TIER Fuels and find a retailer at www.toptiergas.com.

I hope this information can be of valuable use.

Sincerely,
Bob Stone
Service Manager
BMW of Peabody



If you want to visit our web site click here.

BMW of Peabody - 221 Andover Street - Peabody, MA 01960 - 978-538-9900

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Thanks for the info, gpt. Very useful.

 

An interesting perspective on Ethanol production costs.

http://science.howstuffworks.com/question707.htm

 

Ethanol produces less emissions but it lowers MPG and lowers HP.
I don't know why BMW drivers would be interested in it...

 

In California with the phasing out of MBTE we have no choice.

 

What can Californians E60 owners do? Sit and watch.

 

Vote?

ABC

 

Sit and watch your engine blow up.


Get rid of SUVs and we'll be able to burn more gas... make them pay GGT and we'll be more gas efficient around the world. Less ppl will buy them then.

 

MTBE is only used in small amounts but is harmful to humans. I'm guessing they're phasing it out and replacing it the Ethanol (10%) as is the case in some states?

For information on the harm of MTBE... http://www.epa.gov/mtbe/water.htm

and MTBE in fuel... http://www.epa.gov/mtbe/gas.htm

 

Correct.