Prestone teal colored euro coolant has never failed me.
Pros: reliable performance
Vehicle:
BMW
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I just did this because I had to replace my thermostat. Has been fine for 1000 miles now, most of which were hard miles (I have a company car, so the LR3 either gets driven in stop and go city traffic, or off roaded, depending on the weekend). I used GM Dexcool. No issues.
Pros: no issues, fine performance
Vehicle:
Land Rover
Mileage: 1609 km
I've always used the Pentosin equivalent in all my Volkswagens and Audis. Pentosin E/SF. Pentosin SF is G12 (pink) -2005, Pentosin E is G13 (violet) 2006 onwards. Safe to mix with factory fill, of course can always go to the dealer for coolant too. These are concentrate, so you do have to mix 50/50 with distilled water though
Pros: safe to mix, reliable performance
Vehicle:
Volkswagen Passat
If it's inconvenient to go to the dealer, you can buy the correct coolant at NAPA, they carry Pentosin brand chemicals.
Pros: correct coolant available
Comma Xstream G48 coolant is the correct spec if you want to save a couple bucks over BMW coolant.
Pros: correct spec, saves money
Honestly, go with the premixed Subaru blue coolant. It has the correct additives and will not harm the engine.
I always keep a gallon on hand and only needed to top up small loss from summer driving in my previous Outback.
Pros: correct additives, no engine harm, minimal loss
Vehicle:
Subaru Outback
Sitting in the driveway and waiting for your coolant temps to go up is illegal here in Germany.
Vehicle:
Audi S4
I use the purple peak G13 in mine - from autozone. Its actually more pinkish when it pours. Made sure to flush with distilled water before adding the new coolant just in case but its been fine in my car. Don’t overthink it!
Pros: been fine in my car
Vehicle:
Volkswagen Jetta
Prestone does work, but Toyota uses RTV to seal the coolant passages between timing cover/thermostat housing and engine block. Prestone uses 2-EHA which has been shown to be aggressive on silicone, however it’s not uncommon to see leaks with the OE coolant that uses sebacic acid which is also a plasticizer. That said, I have a Sienna and LS430 that’s filled with Prestone, no coolant leaks… yet.
Pros: no coolant leaks
Cons: aggressive on silicone, potential leaks
Vehicle:
Toyota Sienna
Do not use Prestone 50/50. It is technically compatible, but it is a different formulation. Using Prestone 50/50 will shorten your service intervals to 36,000 miles. Beyond 36,000 miles you will cause damage to occur to the seals.
Pros: technically compatible
Cons: shorten service intervals, cause damage
Mileage: 57936 km
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