> That last bit reminds me of some experiment that they did where they 
 > were running a city bus on a concoction that had a lot of peanut oil 
 > in it,  instead of diesel fuel.  It was said to smell like peanut 
 > butter when it went by...    :-)
There's also been experiments on running Diesel engines on vegetable oils; 
they say that the exhaust smells like french fries.
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