View Full Version : Antifreeze and SCA Test Strip Article

11-29-2010, 07:11 PM
Extended Life Coolants

Cooling system maintenance
The cooling system on any diesel has special concerns. It's possible for the coolant to cavitate (produce tiny bubbles) that can with time cause pinholes through the cylinder walls from the water jackets. For this there is an additive; Ford P/N FW-15 or FW-16, Fleetguard P/N DCA4; that needs to be maintained in the coolant. Generally this means installing 8 to 10 oz of the additive to the cooling system every 15000 miles. Another method is to monitor the cooling system with Fleetguard's DCA4 test kit P/N CC2602 or CC2602A. This measures the level of DCA4 in the system, and then you add the amount as required. The cooling system should be drained (and flushed if you live in an area with especially alkaline water) and refilled with a fresh 50/50 mix of coolant/water and one pint of the additive for every two gallons of coolant/water at 30,000 miles. Use only a low-silicate ethylene glycol-based coolant. Ford does not recommend using propylene glycol coolants in any of their vehicles.
Ford or Motorcraft Premium Antifreeze Motorcraft Premium Gold Antifreeze (does not require SCA/DCA)
Texaco Antifreeze/Coolant
Texaco Antifreeze/Coolant Pre-diluted 50/50
Zerex 5/100 (white bottle) Antifreeze/Coolant
Zerex Ready To Use Antifreeze/Coolant (premixed 50/50 with de-mineralized water)
Zerex Heavy Duty Pre-charged Formula
Shellzone Premium Quality Antifreeze
Fleetguard Complete EG--pre-charged at 1.5 units/gallon DCA4
Also available premixed 50/50 with water with the same DCA4 level Pyroil Heavy-Duty Antifreeze/Coolant--Low Silicate
Fleet Charge Antifreeze/Coolant--pre-charged with Pencool

Tips for Using Fleetgard's Teststrips

One of the most common asked questions regarding test strips and how much coolant additive is required to raise the additive to a safe level. This depends on the capacity of the coolant system. Another piece of useful information is that each 1 pint bottle of additive is equal to 5 units.
Fleetguard considers the safe level to be between 1.5 & 2.5 The reason we recommend adding UP TO 2.5 is to help ensure that by the next time you check your coolant it will still be between these levels. Since not everybody maintains their vehicle in the same manner we recommend the HIGH end of the SAFEST LEVEL of 2.5. This has apparently confused some which is why we have added this statement.
For an example on getting your level to the HIGH end of the SAFE LEVEL 2.5
My Friends 99 Ford Powerstroke has a capacity of 32.75 quarts or 8.2 gallons. To figure out how many units 1 pint of additive will raise the coolant level, divide the 5 units by the capacity in gallons (8.2) 5 divided by 8.2 = .61, this tells you that each pint of additive will raise the coolant level .6. If your current level is 1.8 and you wish to reach a level of 2.5 you would need to add 2 pints (2 x .6 = 1.2, 1.2 + 1.8 = 2.5)
To ###ist you in getting the Ph level close to the neutral level of 7.0 Ph try adding 16oz of Plain White Vinegar and run for a day or two and then check your Ph again.