Forum Discussion
ace44
Mar 12, 2015Explorer
I have owned the 6.4 and the 6.7 and a duramax, and I can say without a doubt I wish I had the 6.7 still. The 6.4 in my case never had any significant issues but was extremely hard on fuel. When I stepped up to the 2011 6.7 the fuel difference was very noticeable. Just my 2 cents.
About Travel Trailer Group
44,052 PostsLatest Activity: Nov 23, 2025