Will this give good protection against electrolysis in the international 6.9 diesel?

First check whether you are experiencing chemical and or stray voltage electrolysis. Get PH test strips to see if your coolant is acidic. Take your volt/ohm meter and test for stray (DC) voltage in your coolant. With the 6.9 international you should be doing more frequent cooling flushes and replacements. The VC-8 is an additive used based upon nitrate test strip results. It replenishes nitrate breakdown in coolant or adds to coolant to achieve a proper nitrate level. A simple inline coolant filter installed on the heater hose is helpful to trap metal degradation migration. A multi prong approach is needed to protect your 6.9.

So is this what I need for my 2015 6.7 powerstroke

I have a 2011 6.7 with the “coolant additive” displayed….used this bottle and nothing changed. I’m going to see if the sensor is dirty next.

Can this be mixed with VC12?

I use the VC8 with old school green anti freeze. I do know if you can use it with the VC12/ gold? I would check the specs of VC12

Ford 7.3 L IDI, will be flushing the radiator and changing the coolant. About how many bottles should I buy?

If you are changing the coolant, just purchase coolant with the additive already in it. If you are intent to use standard antifreeze, it will take four bottles of the VC-8 to get you in the protected range according to test strips. Once you have established protection, test your antifreeze yearly with test strips and ad VC-8 if needed.

Ford Genuine Ford Fluid Vc 8 Diesel Cooling System Additive

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Description

🔧 Keep your diesel cool and your ride cooler with Ford’s genuine VC-8 additive!

COLOR CODED CLARITY - Innovative red dye eliminates coolant color mix-ups, maintaining system integrity and peace of mind.
OEM GENUINE QUALITY - Ford’s authentic additive guarantees premium performance and protects your investment.
MAINTENANCE MADE EASY - Designed to replenish additives lost between coolant changes, extending engine life effortlessly.
PRECISION FORD SPEC COMPLIANCE - Engineered to meet exact Ford ESE-M97B44-A and WSS-M97B51-A1 standards for ultimate reliability.
UNIVERSAL DIESEL COMPATIBILITY - Seamlessly replaces multiple antifreeze types, ensuring broad diesel engine coverage without hassle.

The Ford Genuine VC-8 Diesel Cooling System Additive is a 16 oz. red-dyed, OEM-approved formula designed to meet Ford’s stringent specifications ESE-M97B44-A and WSS-M97B51-A1. It universally fits diesel engines, replacing depleted additives between coolant changes while preventing color confusion with its unique red dye. This additive ensures optimal cooling system performance and longevity, making it an essential maintenance product for Ford diesel vehicles.

Reviews

A**R

good price

correct stuff

28.09.2025

C**3

Must have for 7.3

Works great and lowered the water temperature tremendously while pulling trailers up mountains. Use the test strips to get it to the right mixture

23.09.2024

M**A

Ford

Great for the ford diesel

27.06.2025

C**A

Great Stuff!

Gant beat Motorcraft genuine products. I've used this for years, adding between coolant changes. Keeps the cooling system healthy and ready for towing here in TX. Highly recommended!

26.08.2024

P**T

good

14.06.2021

D**8

Works

Does the job

23.04.2025

S**N

Coolant

It is what it says it is.

5.11.2024

N**C

Decent Price - Arrived Without Leaks

Bought this as additive for my Ford Tractor's coolant to prevent cavitation. Price is decent, instructions for mix ratio are clear, and the item arrived well packaged and with no leaks.

17.04.2023

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€ 41.98

Duties & taxes included

In stock

Sold byAmazon IrelandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Manufacturer	Ford
Brand	Ford
Model	VC-8
Item Weight	0.96 ounces
Product Dimensions	7.9 x 2.3 x 2 inches
Item model number	VC-8
Is Discontinued By Manufacturer	No
Exterior	Machined
Manufacturer Part Number	VC-8
OEM Part Number	VC8

Ford Genuine Ford Fluid VC-8 Diesel Cooling System Additive - 16 oz. , RED

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