Originally Posted by bigredtruckmi
The fuel tank has a steel outer layer and a plastic inside. There are reports of the plastic separating with high bio % use. I've read this on FTE site in the 6.0 forum.
This is totally false information. The only steel tanks are used on the E series vans . All F series have the plastic tanks and have not had a single problem with delamation . Somebody started that in the 6.0 forum (beachbumcook) and he didn't know what he was talking about.