Is it possible to infringe on a trademark by using a specific term in a slogan?

For instance, if my company is unique, my LOGO is a cartoon of a truck overflowing with businessness people, and we offer on-site administrative/bookkeeping support to businesses and my slogan is "Delivering Expertise in Luling, Louisiana"...which I'm abbreviating to DELL. Is this considered infringement against the computer company DELL, simply because I"m using the word/term DELL in my slogan? My presentation of the word DELL is different, and obviously my use is different...but I don't want to get in trouble just b/c maybe I shouldn't have that abbreviation at all. .or is it okay?