I'm interested in the $COSTS$ of these alternative colored coolants?.

and mellow yellow sounds interesting.. 

but i'm seriously considering Evans racing coolant ( EVANS NPG+* NON-AQUEOUS COOLANT)
http://www.evanscooling.com/html/npgPls.htm 

Evans would be about $150~ to do the van, and have an extra gallon on hand for top offs/bleeding
but it's a 1 time (unless roadside emergancy) cost..  and if i'm going to pay $50~ for yelo/bluu/grn/orng/red  but still have a pressurized cooling system pushing on all of my expensive hoses (Diesel hoses in my case)

I'm becoming rather keen on the NO COOLING SYSTEM PRESSURE aspect.. 
zero pressure seriously reduces the risk of hose or cylinder leakage
(won't have any effect on heads that leak while parked/cold as in winter seal contraction)

heres only a very few pooints,  read the whole tech sheet if curious or skeptical
7.NPG+ is highly non-conductive electrically. Electrolysis, a problem in water-based coolants that damages gaskets and hoses, does not occur
8. Pressurization, a method to raise the boiling point of water-based coolant is not necessary. With low pressure, system components are under reduced stress.

Subject: Re: blue vs green vs orange coolant

Just to add to the confusion, over in the Mercedes world, they all swear by
Xerex G-05, which is the same as MB spec phosphate free coolant -- it's
yellow.  I'm planning on running my Vanagon on the mellow yellow when I
flush next.

On 8/8/06, William Manley <william.manley@gmail.com> wrote:
>
> What are the pros and cons of blue vs green vs orange coolant?