Originally Posted by josh9465
so in Aust where the temps are warmer, its better to use a 30/70 coolant? i think i get that.
i gather water is better at absorbing heat than pure 100% eth-glycol???
so what coolant brands at 30% do you recommend to use in the 4.0L carves?
cheap and nasty, expensive or mediocre?
Eth-Gly in addition to being an anti-freeze ... is a heat transferring item ... not so much a cooling product ... Gathers heat OK ... but needs a damned good heat exhanger unit (radiator) to lose the heat ...
Dont even mention using 100% eth-gly
60/40 Eth-Gly/Water ... is the max even chrysler recommends .... and is most useful for when on a polar bear hunt ....
30/70 will give you a slight gain, as will a slightly lower thermostat rating and a better fanclutch etc. Its all dependant on how you approach your cooling system.
Gotta remember - A jeep ... or any other vehicle ... doesnt have a radiator, fanclutch or coolant etc ... It has a "cooling system" ... and the cooling system has a radiator, fanclutch, coolant etc.
Overall benefit is a mild combination of things rather than looking for a major "fix" with just one item.
I recommend a quality known brand with aust std ratings and the additives
your vehicle needs .... and would be very shy on a Crazy Clarks special or any other mix offering miracle overheating cures
own personal use ... I just use the tectaloy 60plus "type B" 10/90 mix and change it every 12mnths. Using a fancy 5yr longlife coolant to keep the ecofreaks happy doesnt rattle my chains ... But "type B" is not ideal if you have a heap of aluminium bits tho.
If I was spending some time down the snowy I would run a 30/70 ... even though I never used anti-freeze when I lived down there and the HR was a new holden release
...... I'd reckon a 30/70 mix in the Valvoline G-05 ( http://www.valvoline.com.au/files/productpdfs/52.pdf
) would probably be pretty good. G-05 is pretty much the formulae Mercedes has been using for donkeys ages apparrently ... and the other coolant brands have their versions.
With Rodges permission I might provide a bunch of eth-gly/water mix characteristics and the original tech site link in a later post ..... but I need to lay it out so that the individual bits of info arent misconstrued
So PM, post example, heading your way for approval in a few days Rodge.