Yellow antifreeze

03Duramax

03Duramax

03' 2500HD Crew Cab
Feb 23, 2013
5
0
0
Omaha,NE
I have been hearing a lot about this yellow antifreeze having the diesel additive (lubricant) already in it and much better for diesel engines including heavy equipment. Just looking for some opinions or people who can back this up before I flush and change my coolant.

P.S. currently running prestone green with additive, first thing I did when truck was purchased was to get that dexcool crap out of the truck
 
Vrabel

Vrabel

TOYAHOLIC
May 22, 2008
3,434
0
0
57
Hewitt, NJ
Diesel additive for coolant?!?!? The coolant never encounters anything different in a diesel from a gasser. other than run cooler, and at a lower RPM. So what lubricant is needed other than for customer being convinced to buy it?
 
H

Hot COCOAL

May the farce be with you
Jun 9, 2012
4,433
0
0
Aside from the extended operating life, Dexcool seems to have more lubricity than the green stuff...

I've recently messed with both and the dexcool almost feels like a lubricant, it's really slick/slippery

I know there was issues with dexcool when it first came out, but I think it's been perfected over the years...

I lol'd when the guy I bought my TBSS tried using the green coolant as a selling point and now I'm stuck using the green coolant in it:mad:
Well, I could run dexcool but supposedly once you contaminate the coolant system with anything else the long life beneficial properties of dexcool are null and void. I don't see anything "wrong" with using standard glycol based coolant tho, just need to keep the system maintained more frequently
 
minisub

minisub

6-5/6-6;Whatever It Takes
Sep 11, 2006
474
0
16
Cleveland, OH
03Duramax said:
.....

P.S. currently running prestone green with additive, first thing I did when truck was purchased was to get that dexcool crap out of the truck
Click to expand...

That is unfortunate.

HOAT coolant is spec for many diesels. I run it in my Jeep and John Deere as it is spec and what they came with. Sticking with spec and not changing up is probably more beneficial than any imperceptible difference between green, yellow and orange.
 
03Duramax

03Duramax

03' 2500HD Crew Cab
Feb 23, 2013
5
0
0
Omaha,NE
Just seems like there is proven problems with the dex-cool and have personally seen dex-cool read on a voltage meter with only 50,000 miles. I realize everyone has their own likes and dislikes just not worth the risk for me. Thanks for any practical responses.
 
Burn Down

Burn Down

Hotrodder
Sep 14, 2008
7,092
28
48
Boise Idaho
03Duramax said:
Just seems like there is proven problems with the dex-cool and have personally seen dex-cool read on a voltage meter with only 50,000 miles. I realize everyone has their own likes and dislikes just not worth the risk for me. Thanks for any practical responses.
Click to expand...

If you were reading voltage on the cooling system, you had poor grounds on the engine...

Dexcool is just fine.
 
thunder550

thunder550

Active member
Apr 2, 2013
1,176
16
38
Phoenix, AZ
Hot COCOAL said:
I lol'd when the guy I bought my TBSS tried using the green coolant as a selling point and now I'm stuck using the green coolant in it:mad:
Well, I could run dexcool but supposedly once you contaminate the coolant system with anything else the long life beneficial properties of dexcool are null and void.
Click to expand...

I think as long as you get all the green stuff out you can go back to Dex. The main issue that I've heard of is mixing them. Flush your cooling system out well with water and you should be fine I'd think.
 
03Duramax

03Duramax

03' 2500HD Crew Cab
Feb 23, 2013
5
0
0
Omaha,NE
Friend is a mechanic who showed me a vehicle that he could put negative prong on the battery and dip the positive into the holding tank and it showed about 1.5v on meter.

Burn Down- vehicle was clean and newer model can't imagine it had a ground problem.
 
DBUSHLB7

DBUSHLB7

Team DMAX
Mar 9, 2012
2,789
0
0
Albuquerque, NM
Man I've heard so many "old school" mechanics talk smack about "Dexacool" yet as other have pointed out... The vehicle owner thought that the original coolant from the factory had a lifetime warranty. Change the coolant people it ain't rocket science. Damn witch hunt people
 
TheBac

TheBac

Why do I keep doing this?
Staff member
Apr 19, 2008
15,610
1,865
113
Mid Michigan
Mixing DC and regular will get you a gooey brown sludge throughout your cooling system and eventually kill your engine.
Had a buddy with a '97 Camaro 3.8 who had the Instant Oil Change places top off his cooling system, but those monkeys didnt know DC from green.
His engine blew up when the cooling system finally gummed completely up. Man, it was bad.
Had to replace the engine, install new radiator, hoses, heater core......EVERYTHING had to be changed out. I did that swap the year I had the cast on my hand (for those who remember that oops). It was a very expensive mistake on his part, but he's put almost 150,000 miles on that car since.
 
LBZ

LBZ

Super Moderator
Staff member
Jul 2, 2007
9,903
149
63
46
B.C.
I have some yellow coolant at home - can't remember the name of it - but it is compatible to be mixed with all types of coolant and is primarily recommended for diesel applications. It is way more expensive than regular anti-freeze but my buddy who owns a trucking company swears by it.
When I get home I will post up who makes it.
Nothing wrong with dex cool. I ran it for over 120 000 miles in my dmax and had no issue with water pumps, overheating, and it still looked and tested good. PH was a little high but that was likely from the side of the highway tap water I had to add once when a coolant hose for my webasto started leaking.
 
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