Can anyone please explain to me why the owner's manual for an '05 FE 550 E shows the fuel required to be RON 95 (US=premium RON 91). Is there some difference between the Euro spec and the US model? Is there some difference that allows the US model to run a lower grade of fuel for what I would assume is identical compression ratio? Maybe US fuel is graded differently? Sorry if it's a newb question but I couldn't find anything by searching. Thanks in advance for your time and input.
RON 95 or US RON 91?? Confused
- Thread starter Outcast149
- Start date
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
The United States uses R+M/2
Research plus Motor divided by 2.
Many other countries rely on Research numbers only.
91 R+M/2 is sufficient.
Dale
Research plus Motor divided by 2.
Many other countries rely on Research numbers only.
91 R+M/2 is sufficient.
Dale
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