guzzirider

At 65000 miles my o3 is a little low on coolant.

the stuff in the overflow tank is pink not green what do I need to replace / add to this

Thanks

Smkndzl

the coolant is called HOAT , dont know what the H stands for , but it is a Organic Acid Technology coolant, dont mix it with the green stuff.

bluebull

NAPA sells it, Zerex makes it.

BothellDiesel

Rotella ELC is great coolant aswell.

XLR8R

Hybrid Organic Additive Technology

bluebull

Just make sure it's a H.O.A.T type or ethylene type anti-freeze.

All ethylene glycole based anti-freezes can be mixed, it just shortens the long life use out of the extended type anti-freeze.

Do not mix propolene type with ethylene type anti-freeze or you could end up with jello in your cooling system.

XLR8R

Diesel-spec Water Wetter is good stuff, too.

PourinDiesel

The orange stuff is a "DEXCOOL" equivalent. Usually about $10 a gallon at wally world.

From an online article:

"The "DexCool" designation means the coolant passes General Motors performance testing. Although DexCool is not a specific formula, all three brands that have the label (Texaco Havoline, Prestone Extended Life and Zerex Extended Life) are somewhat similar. In particular, they're OAT coolants, but the similarities go beyond that basic description.

All DexCool-approved coolants to date use two organic acid rust/corrosion inhibitors, one called sebacate, the other called 2-EHA (which stands for 2-ethylhexanoic acid). These organic acids are very stable and last a long time, although they take thousands of miles to become fully effective in protecting coolant passages"