Antifreeze..Color???

[Speedjester]

Well was changing out my coloant filter and noticed that the antifreeze was Green.. Is this OK?....He fleet charge I brought to top off he system is Purple.. What is the difference ?... Are they compatible?...any info would be appreciated...

Thank you

[BFlinn181]

This article talks about colors of coolant:
Antifreeze Red Green Orange Yellow Purple Pink Orlando Tampa Jacksonville

You'll need to research the needs of your engine. If it has 'wet sleeves' it needs supplemental coolant additives (SCA) which reduce the damage caused by cavitation. The explosive high pressure nature of diesel combustion causes shock waves in the coolant. These shock waves can create tiny bubbles that can actually eat away at the metal surfaces, eventually causing engine failure. The SCA's, often contain nitrates to form a barrier to prevent cavitation damage. It's important to test your coolant chemically to see if the metals and nitrates are in proper range. Check your manual for your engine or at their website to find out exactly what coolant your engine requires.

[Speedjester]

Thank you for the article.. It confirmed what I was told.. Green is used when using a charged coolant filter... And the fleet Precharge is the same except that it has the additive already mixed in.... Both are compatible..

Thank you

[Ray,IN]

Here is another color chart from Peak. Take note, each bulk purchaser may specify any color they wish to have added to naturally clear Ethylene Glycol.