whats the difference between the "long life" coolant and this "super coolant"?

Subaru Long Life coolant is used on older, higher mileage vehicles (pre-2000’s typically) and Super Coolant is used in just about any Subaru post-2008.

How is this different from regular, old Prestone ethyl glycol ? Why does it cost three times as much? Just because it's blue ?

My 2008 Subaru Outback blew a head gasket last month. It cost me $3100 to have the dealer fix it. Last time I changed the coolant I used Subaru brand coolant. I don’t know if it’s chemically different than any other coolant? The dealership charged me $28.84 times 2, plus $4.94 for cooling system conditioner. I’m pretty ticked that this happened. This is my 6th Subaru and I’ve never had a bad head gasket.

can you top off with alittle water ?

You absolutely can, and typically SHOULD top off with distilled or DI water once the vehicle has a few thousand miles on it (enough time to be sure all the air is out of the cooling system). It's normal to lose water from the mix over time, but the exact amount will depend on your specific driving conditions. The only time I would top off with fresh coolant would be if I noticed a sudden drop in level or some other sign of leaking antifreeze.

ASIN	B007NLOZAU
Best Sellers Rank	#3,882 in Automotive ( See Top 100 in Automotive ) #27 in Antifreezes & Coolants
Brand	Subaru
Date First Available	March 22, 2012
Exterior	Machined
Is Discontinued By Manufacturer	No
Item Weight	9 pounds
Item model number	SOA868V9270
Manufacturer	Subaru
Manufacturer Part Number	SOA868V9270
Model	SOA868V9270
OEM Part Number	SOA868V9270
Voltage	12 Volts

Genuine Super Coolant Blue Prediluted SOA868V9272 1 Gallon Pre Mixed 50/50 2009 and Newer Ascent BRZ Crosstrek Forester Impreza Legacy Outback WRX

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