Hi Idaho,
Do you have any opinion about these products?
Royal Diesel Supreme Ultra
Royal X-140 Oil Improver
Royal Diesel Guard
Our local shop selles these. How do they compair to Delo400LE, Rev-X, & Opti-Lube XPD? I am thinking of changing my 2004 F250 6.0 to the latter. Just wondering if you think this is necessary or a good idea.
Thanks, Jeff jt2@centex.net