Prestone doesn’t meet 2001 Ford spec
The owner’s manual on my 2001 Supercrew (5.4L) calls for a (green) Antifreeze that meets Ford Spec ESE M97B44-A. It also says NOT to use a long life antifreeze that meet Ford Spec WSS M97B44-D.
Prestone’s new antifreeze is labeled as long life so I looked at the specs. Prestone’s website has a FAQ link that mentions specs. It states that Prestone Antifreeze/Coolant (note the name) meets Ford Spec ESE M97B44-A.
A Prestone tech told me today that Prestone has not made that old product for two years (they just leave that spec on the website for all those folks who have old jugs of Prestone sitting in the garage) and the new product
Prestone Extended Life Antifreeze/Coolant does NOT meet the Ford Spec ESE M97B44-A(!). This is the product that Prestone recommends we put in our trucks.
It looks like some of the antifreeze manufacturers are now using different types of corrosion inhibitors. One Ford dealer service rep told me that “as long as it is green there is no problem” while another Ford dealer service rep told me that those specs were written for a reason…. I am worried about alloy corrosion issues.
Should I stick with Motocraft or Zerex brands (the only two I could find that still meet the “old” spec) or are the new long life formulations safe for our trucks? Does anyone know if Ford has mentioned this in any TSB’s?
Last edited by InfernalCombustion; 08-25-2006 at 03:05 AM.