Cummins QSB6.7 Coolant

[VBLOCAL89]

We have a couple of new Wiggins marina forklifts with Cummins QSB6.7 engines. One engine has green coolant and the other one has orange. I assume the orange coolant is Fleetguard OAT? They both came this way from the factory. Not sure why they are different.

We know the green coolant is the Napa Conventional Cooling System Antifreeze/Coolant.

Is there a Napa equivalent to Fleetguard OAT? Does it make any sense to switch our lift with the green coolant to the orange?

 

[BHopkins]

I did a lot of research on Fleetguard coolants, when I did a flush and fill on the Cummins ISC8.3 in my motorhome. Fleetguard does not have an orange coolant. They have red, blue, green and fushia.

The Fleetguard OAT (ES Compleat OAT) is red, and from what I have found, this is the coolant recommended for the QSB6.7. I don't think NAPA offers an equivelant, but Zerex Heavy Duty Extended Life is registered to Cummins CES 14603 and 14439, and meets the same ASTM specs as Fleetguard ES Compleat OAT.

The advantage to the red OAT is, it is an extended life coolant, and does not require replenishment, like a lot of heavy diesel coolants do. The disadvantage is you will need to do a thorough flush, to switch over.

NAPA does carry the Zerex HD Extended Life, as does most heavy truck shops.

 

[NashNative]

We have a couple of new Wiggins marina forklifts with Cummins QSB6.7 engines. One engine has green coolant and the other one has orange. I assume the orange coolant is Fleetguard OAT? They both came this way from the factory. Not sure why they are different.

We know the green coolant is the Napa Conventional Cooling System Antifreeze/Coolant.

Is there a Napa equivalent to Fleetguard OAT? Does it make any sense to switch our lift with the green coolant to the orange?

Here's some info on the Fleetguard coolants sold in North America; ES Compleat OAT that you mentioned is our best product: https://cms.fleetguard.com/en/literature/which-fleetguard-coolant-product-right-you/lt36237-NA

Let me know if you want to talk with one of our coolant experts and I can connect you via email.

 

[johnmyster]

ES Compleat OAT seems to be marketed as the same type of coolant as Peak Final Charge Global, Rotella ELC NF, and I'm sure one of the Zerex HD offerings.

https://www.owi.com/binaries/conten...-documents/hdaw-2023/peak-hd-afc-brochure.pdf

ES Compleat NOAT seems to be the same as all of the EC-1 NOATs on the market.

Peak Final Charge Pro still seems to be the only one of it's kind.

 

[NashNative]

ES Compleat OAT seems to be marketed as the same type of coolant as Peak Final Charge Global, Rotella ELC NF, and I'm sure one of the Zerex HD offerings.

https://www.owi.com/binaries/conten...-documents/hdaw-2023/peak-hd-afc-brochure.pdf

ES Compleat NOAT seems to be the same as all of the EC-1 NOATs on the market.

Peak Final Charge Pro still seems to be the only one of it's kind.

ES Compleat OAT is a million mile, life of the engine coolant that does not require SCAs or extenders...so no chemical water filters either. It's Nitrite, Amine, Phosphate and Silicate free as well and does not include 2-ethylhexanoic acid, which is known to eat away silicone components like hoses, head gaskets and seals...Cummins does not approve of 2-EH coolants in their CES 14603 spec either worth noting.

 

[johnmyster]

ES Compleat OAT is a million mile, life of the engine coolant that does not require SCAs or extenders...so no chemical water filters either. It's Nitrite, Amine, Phosphate and Silicate free as well and does not include 2-ethylhexanoic acid, which is known to eat away silicone components like hoses, head gaskets and seals...Cummins does not approve of 2-EH coolants in their CES 14603 spec either worth noting.

Peak Final Charge Global is also listed as a million mile, with everything you mentioned. Final Charge Pro is listed as 1.5 million miles, with PhOAT chemistry. For any of the fleetguard coolants, I'm sure there's an HD equivalent from Rotella, Zerex, Fleet, etc...and perhaps some equivalents on the passenger vehicle side.

Three generations of HD coolants have emerged that don't require SCAs. NOATs, generally falling into the CAT EC-1 specification were the first, some of which relied on 2EHA. Then you had your Nitrite free OATs, some of which relied on 2EHA. Now, there are coolants such as the POAT I mentioned, that fall into a third generation.

 

[NashNative]

Peak Final Charge Global is also listed as a million mile, with everything you mentioned. Final Charge Pro is listed as 1.5 million miles, with PhOAT chemistry. For any of the fleetguard coolants, I'm sure there's an HD equivalent from Rotella, Zerex, Fleet, etc...and perhaps some equivalents on the passenger vehicle side.

Three generations of HD coolants have emerged that don't require SCAs. NOATs, generally falling into the CAT EC-1 specification were the first, some of which relied on 2EHA. Then you had your Nitrite free OATs, some of which relied on 2EHA. Now, there are coolants such as the POAT I mentioned, that fall into a third generation.

Remind me on the Phosphated OAT coolants...what's the advantage there? I seem to recall that being a trend coming out of the European market?

 

[johnmyster]

Remind me on the Phosphated OAT coolants...what's the advantage there? I seem to recall that being a trend coming out of the European market?

I'm not an expert, but appears controlled atmosphere brazing and corrosion inhibitors with even longer anticipated life vs nitrite ELCs and nitrite free ELCs.

For me, I can buy Peak FC Pro at a number of places...parts stores, tractor supply, truck stops and walmart. So it's a high grade HD coolant, no 2-EHA, no silicates, and I can find it when I travel if needed. I think Fleet is pushing for shelf space because of the cross-compatibility. I've also heard it's cheaper to produce than the nitrite free ELCs.