[ QUOTE ]
I have a 2000 EX 7.3 -
[/ QUOTE ]
Ford says you have a choice between the old low-silicate green coolant with added supplemental coolant additive, or the newer yellow or "gold" G-05 coolant. The Service Coolant Usage Chart (SCUC) Ford provides to all their dealership techs is at
click here. Note the chart was revised on May 6, 2006, so it is as up to date as anything you can find from Ford.
Some naysayers claim the chart doesn't apply to diesels, but that's ridiculous. The chart includes F-650/F-750 which are available only with a diesel engine.
Note that '99 thru '01 Excursions are coded "GY", which means you can choose between green or yellow coolant. Ford has not approved any other long-life coolant other than the G-05, which is sold as Motorcraft Premium Gold or Zerex G-05 and a few other brands.
I changed mine to the G-05 coolant a couple of years ago, with no issues.
