darren says in a nice way that i was almost right. from my past posts you can see that i thought we had an engine that ran on 90% less diesel than it did before. well..it duzz... its our present tech....i must have forgotten to read the part that the 90% was replaced with nat gas. our engines need both for the combustion cycle. thanks for the prompt and informative email darren. must have been the day i couldnt find my reading glasses. marge says im always losing them....later...