I dont think that would burn up a glow plug, bit I havent owned my 300d long enough to know that yet...
I have had exelent luck with ITUs... one more acrynym (got that one all boogered up) to add to the list...
WVO
SVO
UMO
RUG
ITU
I also find that its fun to just hammer it when someone gets behind me... Not too much smoke (did a diesel purge recently) but still enough to be intereasting
What I like to do is go on old HW 12, and continue down twords fairchild... Big enough hills to run WOT up without gaining much. Turns sharp enough to scare you if you dont know your cars suspention (FORTIONATLY I do... very good shape)... And to top it off, fairchild has about 3 cops, who ALL take sunday off (I love small towns)
~Nate