2003 BMW F650CS is notorious with surges and stalls. Many owners discuss its fix to be the Iridium Spark Plug. BUT I think it goes a little bit deeper than that. I have noticed a great bit of difference in what fuel I use in the bike.
Race Track fuel - still stalls often, but no more surging
Chevron - stalls rarely and no surging at all
In both case, I am using 87 Octane - as most of the Scarver riders suggests. But I also noticed in both fuel type, My MPG has decreased. It was 62mpg this morning - the second worst mpg.
I am curious if I need to do some comparing on different Octane ratings as well, after all the manual recommends the 91+ ratings.
Race Track fuel - still stalls often, but no more surging
Chevron - stalls rarely and no surging at all
In both case, I am using 87 Octane - as most of the Scarver riders suggests. But I also noticed in both fuel type, My MPG has decreased. It was 62mpg this morning - the second worst mpg.
I am curious if I need to do some comparing on different Octane ratings as well, after all the manual recommends the 91+ ratings.
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