Ethylene VS Propylene

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On my 96 the manual states that only Ethylene
glycol should be used. does anybody know the difference between Ethylene and propylene
glycol (sic). and can they can be mixed? I think the coolant that cummins sells (COMPLETE) is propylene based. I would like the convenience of putting (COMPLETE) in my truck next drain since it is already premixed but only if it's compatible. would appreciate any info, thanks trucker1256

 

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The care sheet that cummins gave out at the rally in columbus says good anti-freeze non silicate is good for use weather propylene glycol ot ethylene glycol. The dodge service manual says that propylene is no good???? They say that the boiling point is different and that it will cause overheating, that mixing the products is bad from an anyalysis and recycling standpoint. I think they are just covering thier rears(not with a mag-hytec) and just categorically disallowing its use to keep things simple. IMHO if your out of warranty go for it if you want.
But you do need to do a complete flush
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P. Campbell 1998. 5 ISB 2500 auto green/driftwood, driftwood rickson's 19. 5's, Pro-Zap front bumper, Mag-tech diff cover etc--


[This message has been edited by Peter Campbell (edited 08-27-1999). ]

 

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Complete is Ethylene Glycol based
mixed with 50% demineralized water.
The Dodge service manual says to use
Ethylene based coolants
only. Propylenes temperature range is
smaller than ethylene and can relult
in boil over or freeze up. Dodge
says that propylene has poorer heat
transfer characteristics and can
increase clyinder head temp
eratures under certain conditions.
This is covered in section 7-10 of
the Dodge manual. Complete is low in silicates and blue in color as sompaired to the automotive green type that is high is slilicates. The silicate information was given to me by Fleetguard. From an oil analysis point of view a blend of OEM and complete might hinder analysis but as long as you tell them what coolants might be in there they should have no problem. Hope this helps

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96 RCLB 4x4


[This message has been edited by st-louis-assembly (edited 08-27-1999). ]

 

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I have used Propylene-Glycol based antifreeze since my 94 Dodge/Cummins was two years old, and have had excellant results. I never noticed any differences in heating during pulling, and I have been in temperatures below -15, and above 110 F.

Wayne
amsoilman

 

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I read the same thing in the Dodge Owner's Manual. After researching this a bit, I discovered there is a TSB regarding this. Apparently Dodge wants you to use the ethylene-glycol based anti-freeze/coolant, however, they state the use of the propylene-glycol is OK. The temperature range for propylene-glycol is not quite as great as for the ethylene-glycol based coolants. Cummins "Complete" is a propylene-glycol based coolant, not ethylene-glycol, as stated (posted) by st-louis-assembly. The reason I started researching this topic to begin with was, I had noticed Cummins NW sold "Complete"; thinking it was odd that Cummins' recommendation was exactly the opposite of Dodge's.

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'98. 5 2500 QC 4x4, (black) SLT Sport, ISB, LWB, 3. 54 LSD, auto. , 275 hp. injectors, Glasstite Vision II "canopy", 285 BFG A/Ts on 16x8 M/T Challengers, Warn 4X Boards, Mopar fender flares, front and rear NW Custom stainless steel/rubber mud flaps, Mag-Hytec diff. cover and trans. pan, Edelbrock IAS shocks, VDO Vision gauges, BD exhaust brake and TorqLoc.

 

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fleetguard complete #cc2801 states on the back label that it contains ethylene glycol and has a boiling point of 234 and a freeze point of -34 degrees.

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96 RCLB 4x4