I've been keeping up on my 99 5.4L F150 But I just bought a 93 F350 with the 7.3L Turbo, just wondering what the best oil change interval is on this engine? Also what would be a good aftermarket muffler for this truck?

 

If you aren't working the truck (towing) , then I would recommend changing the oil every 5K.. but if you work it,
don't skip out, go every 3K.. The 7.3L is strong as an Ox
and has been a reliable engine for many years,
Hope it will be just as reliable for you!!


FordMasterTech