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Coolant for older cars #4564116
11/04/17 04:58 PM
11/04/17 04:58 PM
Joined: Apr 2017
Posts: 101
Michigan
Building3 Offline OP
Building3  Offline OP
Joined: Apr 2017
Posts: 101
Michigan
I have several 1960's and 70's cars in various stages of completion. Engines have been rebuilt, cooling systems totally flushed, etc. I was wondering if I should go to the newer HOAT, or the OAT, or perhaps a universal type coolant/antifreeze rather than putting in the older green technology. Once these cars are done I would like not to change the green coolant every two years that is why the other coolants appeal to me with their 5 year change intervals. None of the cars will be driven much, just to shows and to keep things lubricated. I would say hundreds of miles a year and not thousands. Any opinions would be welcome. Thanks

Re: Coolant for older cars [Re: Building3] #4564125
11/04/17 05:14 PM
11/04/17 05:14 PM
Joined: Jul 2016
Posts: 1,481
Jacksonville, FL
FlyNavyP3 Offline
FlyNavyP3  Offline
Joined: Jul 2016
Posts: 1,481
Jacksonville, FL
I asked the same question. The resounding answers were Deere Guard coolant or Zerex G05. No need to change, use coolant test strips.


Luke
P-3C and P-8A Maritime Weapons and Tactics Instructor, Instructor Tactical Coordinator and Mission Commander
Re: Coolant for older cars [Re: Building3] #4564151
11/04/17 05:40 PM
11/04/17 05:40 PM
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
Oro_O Offline
Oro_O  Offline
Joined: Sep 2014
Posts: 1,416
Seattle-ish, WA
I looked into the same issue. G-05 is the answer.

Re: Coolant for older cars [Re: Building3] #4564234
11/04/17 07:15 PM
11/04/17 07:15 PM
Joined: Dec 2014
Posts: 1,671
'murica
Ethan1 Offline
Ethan1  Offline
Joined: Dec 2014
Posts: 1,671
'murica
I've been using Peak Long Life in a 289 Ford for years because I never knew it was a dexclone and, guess what, no problems.

Re: Coolant for older cars [Re: Building3] #4564283
11/04/17 08:11 PM
11/04/17 08:11 PM
Joined: Jun 2003
Posts: 17,348
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,348
Deplorable in apple valley, ca
Do not use an OAT coolant in a copper radiator or heater. It will eat the solder and ruin the radiator. Our warranty is void if OAT is used in a recore or rod out.


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Coolant for older cars [Re: Building3] #4564289
11/04/17 08:28 PM
11/04/17 08:28 PM
Joined: Jan 2008
Posts: 519
Richmond, BC, Canada
mechjames Offline
mechjames  Offline
Joined: Jan 2008
Posts: 519
Richmond, BC, Canada
I use green and you can get test strips. It lasts longer than 2 years.


86 Mustang 5.0L 170km - Amsoil XL 5w30 / Baldwin B2-HPG
14 Ram 1500 5.7 - Amsoil XL 5w20 / Baldwin B7443
98 Jeep ZJ 5.9 - Amsoil OE 10w30 / Baldwin B34
Re: Coolant for older cars [Re: Building3] #4564312
11/04/17 09:06 PM
11/04/17 09:06 PM
Joined: Sep 2015
Posts: 3,861
Connecticut
69GTX Offline
69GTX  Offline
Joined: Sep 2015
Posts: 3,861
Connecticut
Some of the modern green coolants have significantly reduced silicates and/or phosphates, making them not that much different than G05 in that respect.

If you stripped away your former green coolant system chemical protective layers via chemical flushes, it will take much longer to build that protection back up with a low silicate/very low phosphate formula coolant. That's possibly one advantage to sticking with a green coolant that has moderate silicates. If you pick a Zerex G05 for example it has approx 250-300 ppm silicates which will help (and less than 30 ppm phosphates).

Interesting that the Zerex green is also limited to silicates at 250 ppm. I would have thought it had more. No info on the spec sheet on phosphates.

Zerex original Green Coolant


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Coolant for older cars [Re: Building3] #4564461
11/05/17 04:45 AM
11/05/17 04:45 AM
Joined: Jul 2015
Posts: 4,624
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,624
Down Under
I've used Zerex G05 in older engines with success, not as old as yours, but still from back in the IAT (inorganic additive technology - silicates, phosphates, etc) days. The G05 is a hybrid coolant, so it contains both inorganic adds (for quick protection) and inorganic acids adds (for long life).

I changed my Zerex G05 every 5 years and everything looked very clean inside the radiator.


Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154
Re: Coolant for older cars [Re: Building3] #4564504
11/05/17 07:07 AM
11/05/17 07:07 AM
Joined: Jan 2013
Posts: 1,842
Texas
WyrTwister Offline
WyrTwister  Offline
Joined: Jan 2013
Posts: 1,842
Texas
I have used the old green coolant for years . Our 1991 Caprice has it .

Our 2015 Sonic & 2006 Lacrosse both have DexCool . Will probably stick with DexCool , in them , for now . Both , I dumped 1 gallon and added a gallon of fresh / new DexCool .`

Best of luck to you all , :-)


Wyr
God bless
Re: Coolant for older cars [Re: Building3] #4564523
11/05/17 07:35 AM
11/05/17 07:35 AM
Joined: May 2012
Posts: 5,380
Fort Lauderdale, FL
DoubleWasp Offline
DoubleWasp  Offline
Joined: May 2012
Posts: 5,380
Fort Lauderdale, FL
Rotella ELC. It's an OAT coolant that has an inhibitor package to protect solder, brass, copper, and a variety of mixed metals. No need to hunt it down at a specialty store or dealer. It's at WM and AAP. Also silicate free, like most ELC.

Using this in a lot of old radiators without issue.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
17 Maserati GranTurismo Cabrio
Re: Coolant for older cars [Re: DoubleWasp] #4564538
11/05/17 08:02 AM
11/05/17 08:02 AM
Joined: Dec 2010
Posts: 964
Lexington, NC
tc1446 Offline
tc1446  Offline
Joined: Dec 2010
Posts: 964
Lexington, NC
Just filled my tractor with Rotella ELC 50/50....color is red.


'13 Accord EX-L 2.4L (100K) M1 & FU
'00 Ford Ranger 4.0L {65K} M1 & FU
'18 Polaris Slingshot 2.4L GM
'07 Kioti CK-30
Re: Coolant for older cars [Re: Building3] #4564823
11/05/17 01:10 PM
11/05/17 01:10 PM
Joined: Apr 2017
Posts: 101
Michigan
Building3 Offline OP
Building3  Offline OP
Joined: Apr 2017
Posts: 101
Michigan
Thank you very much for the quick replies. It sounds like using the older green technology with test strips or the hybrid G05 are both acceptable and easy to find anywhere.

Re: Coolant for older cars [Re: Building3] #4565582
11/06/17 07:47 AM
11/06/17 07:47 AM
Joined: Apr 2009
Posts: 1,288
oh
roadrunner1 Offline
roadrunner1  Offline
Joined: Apr 2009
Posts: 1,288
oh
The Deere CoolGard II is specifically designed for the applications you have described as its good for new tier 4 compliant diesel engines and also good for all of their gas/diesel legacy engines. I currently use it in over 20 engines, varying from a couple '49 Ford flatheads to new marine diesel engines. Its service life is 6 years/6,000 hrs. and can be extended with their additive.


'15 F350 6.7
Re: Coolant for older cars [Re: Building3] #4565913
11/06/17 02:21 PM
11/06/17 02:21 PM
Joined: Jan 2004
Posts: 4,155
California
nthach Online content
nthach  Online Content
Joined: Jan 2004
Posts: 4,155
California
You can still get old school green, Zerex's formula is closer to G-05 but probably doesn't have an organic acid. Many parts stores have the old school green but in low silicate formulation to play nice with SCAs.

Re: Coolant for older cars [Re: SR5] #4572375
11/13/17 05:42 AM
11/13/17 05:42 AM
Joined: Jul 2015
Posts: 4,624
Down Under
SR5 Offline
SR5  Offline
Joined: Jul 2015
Posts: 4,624
Down Under
Originally Posted By: SR5
The G05 is a hybrid coolant, so it contains both inorganic adds (for quick protection) and Organic acids (for long life).


Fixed typo from above.


Penrite Vantage 10W40 SN & A3/B4 + Wesfil-Cooper Z154
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