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.

Genuine Fluid Vc 8 Diesel Cooling System Additive 16

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Description

🟡 Keep your diesel cool and your ride cooler with Ford Genuine VC-8!

COLOR STABLE FORMULA - Innovative yellow dye eliminates coolant color changes, ensuring easy maintenance and no guesswork.
COMPACT READY TO USE - Convenient 16 oz size with smooth exterior, perfect for quick, professional-grade maintenance.
PRECISION FORD OEM COMPATIBILITY - Seamlessly replaces V119 & Motorcraft coolants meeting exact Ford specs for peak engine performance.
HEAVY DUTY DIESEL ENGINE OPTIMIZER - Specifically engineered for diesel cooling systems to prevent overheating and extend engine life.
ADDITIVE REPLENISHMENT BETWEEN CHANGES - Designed to restore depleted additives, maintaining optimal coolant efficiency between service intervals.

Ford Genuine Fluid VC-8 is a 16 oz diesel cooling system additive engineered to meet Ford specifications ESE-M97B44-A and WSS-M97B51-A1. It replaces premium antifreeze/coolants in heavy-duty diesel engines, featuring a yellow dye to maintain coolant color consistency and restore depleted additives between coolant changes, ensuring reliable engine temperature management and OEM-level performance.

Specifications

ASIN	B000NU3LPS
Brand	Ford
Customer Reviews	4.8 4.8 out of 5 stars (446)
Date First Available	5 September 2013
Exterior	Smooth
Item Weight	227 g
Item model number	VC-8
Manufacturer	Ford
Manufacturer Part Number	VC-8
Model	VC-8
OEM Part Number	VC8
Product Dimensions	20.07 x 5.84 x 5.08 cm; 226.8 g

Reviews

A**R

correct stuff

28.09.2025

C**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

Great for the ford diesel

27.06.2025

C**A

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

14.06.2021

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¥11209

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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Genuine Fluid VC-8 Diesel Cooling System Additive - 16

Description

Specifications

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Common Questions