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Final charge coolant

I am planning a long trip for the summer to celebrate being unemployed (retirement). I have a 8.3 Cummins with the green IAT coolant.  I'm considering converting to the OAT Final Charge. I've been researching the forum for any information I can find and corresponding with Red Tractor to get his thoughts. Is there a particular type of Final Charge to look for? I don't really know how old the coolant is so I thought best to start a new. Looking for advice for the older MH if I should switch to OAT. I have posted a picture of a Final Charge example. Thanks in advance!
Michael & Roxene, Aussie the wonder dog & his daughter Luna the lunatic.
1993 Grand Villa Unihome 280 build #4203
36' 8.3 Cummins 300 hp- 2001 Chevrolet Tracker toad

Re: Final charge coolant

Reply #1 –
I use the Final Charge coolant or the equals in most everything. It does it all. It does have some tolerance to be mixed with other coolants. I always have reservations flushing cooling systems as there sometimes can be more harm than good. As much as I hate paying for water I have also learned to just get the ready to use.
 Look for specials at Zoro and Walmart. Get it delivered.
I would look to disconnect hoses and use a vacuum blower or compressed air to get out as much as possible Disconnect and blow out the heater loops also. If you have a coolant filter replace the element with one that does not have the SCA. Consider replacing the thermostat(s) and maybe even the water pump if condition unknown. Good time to inspect and replace any hoses or clamps that are questionable. Fill, bleed, and enjoy. If coolant color indicates that there was still a lot of old coolant, run for a year or so and then drain and fill again.
Dennis Haynes
Bohemia NY
2008 Nimbus 342 SE Carlyle
Build #6475
Motorcade #19148

Re: Final charge coolant

Reply #2 –
Consider using one of these kits to refill, much easier to get all air out then plan on checking and filling system frequently for a few trips. Jim.
Jim and Dona
2002 U295 36'
Lily, blue healer. Our fury person
Manx mid travel Ecotec turbo
2022 Bronco badlands Sasquatch
Trail 90 and 110cc

Re: Final charge coolant

Reply #4 –
I have the mechanical C8.3 and I followed Wolfe's step by step change over process. I used Fleetguard  OAT and distilled water as per Wolfe's instruction. It's a pain to recycle the old coolant but I'm glad I converted. Purchased OAT at Cummins dealer.
1998 36 foot U270 Build No. 5328 WTFE, 900 watts solar, Victron controller, B2B, bat monitor, 600 AMPH lithium with 2018 Chevy Colorado toad, SKP #110239, Motorcade #17781, 2021 Escape 17B for when Coach is broken down and campsites are too small, retired and full-timer since Dec. 2020. Part of RV family since 1963.

Re: Final charge coolant

Reply #5 –
Quote from: fourdayoff –
Consider using one of these kits to refill, much easier to get all air out then plan on checking and filling system frequently for a few trips. Jim.
When filling with new coolant leave the filter loose. As you add coolant, it will start to run out the filter. Tighten the filter at this point and fill to full. No air pockets.
1994 U280, Build 4490
Deming, NM.

Re: Final charge coolant

Reply #6 –
Used the Fleetguard Oat when I did mine,found on Ebay.It's the brand Cummins reccomends.
96 U270 BUILD 4810
85 380SL
Drummonds TN.