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I looked into this a slight bit in the past and heard modifications might be needed in order to run biodiesel, I think this is something that should require some good research before getting into.

Welcome to the forum, post an intro thread!
 

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So you don't need to make any modifications to run biodiesel then. I suppose at higher grades you might need to though.

Any idea why it shortens the oil change intervals?
 

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Shaker223 is correct. Nothing more than b20.*

Most modern*diesels can't use more than b20. It's beacuase of how they handle the regen process. Engines that can use b100 have an enjector built into the exhaust system. Manufacturers now use the computer to inject fule into the cylinders during the exhaust stroke. This saves money on parts. The issue is biodiesel is more viscous and not all the biodiesel will atomize. So some fuel will seep past the rings and contaminate the oil.*

Take a look at this link
Biodiesel Compatibility - Engine Biodiesel Fuel Compatibility

I was disappointed when I found this. So it looks like the auto industry will keep us locked into patrolium based fules for quite some time.
 
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