What's the difference between Green and Blue Subaru Coolant?

[@kyles9465]

Just to add to the great video. Subaru has a coolant product to lower the freezing point of the Super Coolant premix for really cold climates. It's called Genuine Subaru SOA868V9260 Super Coolant Concentrate, 1 Quart Bottle. It can be difficult to find as most owners don't subject their cars to temperatures cold enough to need this product... but I do. You can blend this in to reach your desired freeze point.

[@FlatironsTuning]

That is definitely good to know. Thanks for the information and Stay Tuned!

[@Isaiah5417GdLk]

Thank you so much for clearing this up. Now story time. Years ago i believe 2014 I bought a badly neglected green 2001 outback from a small car lot at someones home as a "project" and boy was it. I found out the front wheel bearing was beyond gone, and of course the head gasket was also. Took my time, took the engine out changed the gaskets and the clutch, which was toast too. New timing belt, all this at 186,000 miles. I still drive that car today, with i believe 198000 on it. I love my old girl. Im in Louisiana mind you, All this really to tell you on the back hatch the dealer tag still on it says......Flat Irons Co.

[@satsun]

I agree that it doesn't make sense to put the coolant conditioner in the turbo vehicles, but the factory service manual for the 2017 STI says to add the conditioner and then add the coolant. I get the impression that they simply copy/pasted their coolant fill instructions from other vehicles.

[@FlatironsTuning]

Wow. What page are you seeing that on? Thanks for watching and Stay Tuned!

[@satsun]

@@FlatironsTuning CO(STI)-12, page 480 of the 2017 WRX/STI FSM PDF that I have. ENGINE 1 SECTION -> COOLING CO(STI) -> 3. Engine Coolant. Refers to SOA345001 'protective agent'.

[@FlatironsTuning]

@@satsun I looked in the 18 STI/WRX manual and see the same thing. Very surprised by this. Thanks!

[@shamwaymoonyos9578]

I have a 2015 Subaru WRX with 101k miles in it currently. At around 24k miles ago on May 2021 I changed the super coolant using the super coolant as it had in factory. I did a drain and fill. Did not use any distilled water or any water period. I didn't replace the thermostat then or do anything with water pump. This time around when I hit next 80k miles I'll be replacing thermostat. I may do it sooner as the thermostat is original but will do a drain and fill again. I'm not at my car and can't confirm atm but I recall that also for the 2015 WRX you use the conditioner bottle in the coolant as well along with super coolant. Not looking forward to replacing the thermostat based on what I read it's in a tight spot requiring dropping some pipes to get access. I may be wrong.

[@barrythomas6429]

I had a big overheat with my 06XT when the top tank split. It was a bright sunny day so I did not see the temperature gauge pegged to MAX until it had covered everything in the engine bay with green coolant. Got it trucked to my local workshop to replaced the radiator. They advised me to keep an eye on the level in the overflow bottle, and it soon become apparent there was an issue. As a first step I added a bottle of the Coolant Conditioner (Holts Radweld). Touch wood, it has never had a coolant problem since. But that plastic top tank makes me nervous.

[@HugoHardinge]

Killer B makes a nice metal overflow

[@FlatironsTuning]

Thanks for the comment! I would say that if you know you had that issue, the best long term fix would be to replace the radiator. But definitely glad to hear your car is holding up so far. Thanks for watching and Stay Tuned!

[@josel.dominguez6747]

Thanks guys for sharing your video and you answered my questions, thanks again and regards.

[@FlatironsTuning]

Thanks for watching and Stay Tuned!

[@4rct1c9Ic3m4n]

I used coolant without conditioner. I started having overheating issues/ head gasket leak. Flushed the coolant system, and used the conditioner and everything was fine again-this on OEM MLS head gasket

[@FlatironsTuning]

Glad to hear that it worked for you. Thanks for watching and Stay Tuned!

[@__MAT__]

Another excellent video! Thanks for your time.

[@FlatironsTuning]

Absolutely! Glad we could help. Thanks for watching and Stay Tuned!

[@CrankImmortals]

What's the difference between the white bottle and black bottle Super Coolant. I read the new black one has an additional corrosion inhibitor: 2-ethylhexanoic acid, sodium salt. Which one is better?

[@dj5752]

Ok. Understood. But what if you used Prestone's 50/50 pre mixed? It says on the bottle good for all cars

[@DeadMixXgod]

Can I mix non-OEM green and blue?

[@mrbuck2646]

Can I change Blue coolant different brand to blue coolant different brand

[@alexmccormick4836]

If the difference between the green coolant and the blue coolant is that Subaru pre-mixed the blue with good water, could we get 100k miles out of the green coolant if we mixed it with distilled water? Also, I have 2001 Impreza and a 2002 Forester both with EJ25s non-turbo engines. If I flush out the green coolant and put in the Subaru blue coolant would they also be good for the 100k change intervals (even though they're older cars)?

[@asdreww]

Hi Flatirons, I have a question (not related to the subject) - is it ok to replace just one tyre on an older WRX/STI, if you get a puncture, or do you need to replace in pairs, or do you need to replace all 4 in one go? I've heard lots of conflicting info on this - some people say you have to replace all 4 at once or you risk damaging the center viscous diff, & potentially the front/rear diffs aswell.

[@FlatironsTuning]

Thanks for your question. On an All-Wheel Drive Subaru (and most All Wheel Drive cars for that matter) all of the tires need to be the same circumference. If they aren't, the speed of the front and rear axles will turn at slightly different speeds, and yes, this can damage either the differential on that axle, or the center differential. So if you have a flat, you either need to have a tire shaved to be the same circumference as the other 3 tires, or get 4 new tires. We might add this to our QotW, but I wanted to give you a clear answer for that here. Hope that helps and Stay Tuned!

[@hustleperformance9004]

Really good video!

[@FlatironsTuning]

Thanks for watching and Stay Tuned!

[@kyleraisch9107]

Would the conditioner hurt a multi layered head gasket?

[@FlatironsTuning]

Thanks for the question. It wouldn't hurt the headgasket. But the conditioner/stop leak has a tendency to clog up parts of the cooling system. That is why it is not recommended. Thanks for watching and Stay Tuned!

[@erickcastro22]

I have a BMW and I mixed the green and blue together should I need to flush it and just use one coolant color?

[@ronniecortegana8581]

Hi, and what about the red/pink coolant? Is good for turbo Subarus? Thanks!

[@FlatironsTuning]

Thanks for your question. I'd always say to use only Subaru coolant in your Subaru. That is the safest bet. Thanks for watching and Stay Tuned!

[@durransmith9943]

What about Evans waterless coolant?

[@FlatironsTuning]

That... Is a tricky one for sure, and not a simple answer. The local cars we have seen try it end up running a fair amount hotter, especially on track, because the waterless coolant is slower to release heat than water. There are definitely some benefits and drawbacks. It is also unclear at some tracks whether or not it is allowed because I believe it does still make the surface slick. I hope that helps and Stay Tuned!

[@mikejmahon28]

I got my 2016 wrx In 2017 with 18k miles. The coolant appears green?

[@Christosan88]

I want to install an oil pressure sensor in place of the oem dummy sensor, what are some good non china brands to look at?

[@FvD714]

defi aem

[@NiSmO300ZX069]

Auto meter Prosport Apexi Greddy Hks

[@wenwang8933]

Can blue Subaru coolant be mixed with other brand coolant (blue or green) without causing damage?

[@FlatironsTuning]

Thanks for your question. As long as the other brands of coolant are glycol based coolants that would also be compatible with a Subaru, then you should not have any issues mixing the coolants together. But it would be most ideal to switch to all Subaru coolant when possible to make sure that you have the proper formulation for your car. Thanks for watching and Stay Tuned!

[@carlcolvin8320]

​@@FlatironsTuningvery good topic. I am Reno Nv and I went to Subaru dealership in Reno and they told me that they were out of Blue coolant. I have a 2022 OBW . They said that I could use any blue coolant I told them okay. They have a bad reputation for being stupid. I went to the Carson City Subaru dealership and told them that Reno said that I could use any blue coolant. They told me that if I did use another blue coolant it would mix with the other coolant and then turn into sludge. What do you think.

[@TrumpVirus-b2l]

Used to live in South Reno. Reno subaru is the worst of the worst. Incompetent parts dept, and their service techs are a joke! You made the right choice asking Carson City subaru as they are much better in regards to their service, and parts departments They usually have the parts you need at carson subaru, but they do have high part prices. I would believe Carson Subaru over Reno any day.

[@TrumpVirus-b2l]

Also ordering parts online from Carson subaru is much cheaper, and they have good discounts when ordering online. I would never believe a thing Reno Subaru says, and those idiots at their parts department are lazy, slow af, and could care less helping you…

[@brayannexon4613]

I guess I have an answer for blue vs green subaru coolant quetions at the parts store now thx.

[@FlatironsTuning]

Thanks for watching. Stay Tuned!

[@HugoHardinge]

Not coolant related, but I have a question about mixing oil. I run 5W40 (Motul excess or xclean) in my turbo Crosstrek. I have an external oil cooler so I fill up with 5L of Motul and an 1L bottle. Can I mix 5W40 oils? Sometimes I use Eneos 5W40 and have topped up. What do you guys think. Very curious to know!

[@FlatironsTuning]

Thanks for the question. To the best of my recollection, one of the requirements of the API is that most any given oil has to be mixable with another similar oil. So I think that it will blend in okay. When I have had to do this in the past (on a road trip, at the track, etc.) i usually try to change the oil shortly there after. I'm not sure what the long term issues might be, but that always seemed to be the best option to me. I hope that helps and Stay Tuned!

[@HugoHardinge]

@@FlatironsTuning thank you! That’s very helpful!

[@antonis07]

Can I fill only green coolant without mix water ;

[@FlatironsTuning]

No, since the Green coolant is not pre-mixed, you do need to mix it 50-50 with water. Thanks for watching and Stay Tuned!

[@timin770]

I bought a quality rebuilt engine today for my '01. I'm going to use blue

[@FlatironsTuning]

Nice! Thanks for watching and Stay Tuned!

[@AaronAnderson323]

Water and RMI-25 = WIN!

[@FlatironsTuning]

Thanks for watching and Stay Tuned!

[@Raven420]

Can I put blue in my 2004 sti?

[@FlatironsTuning]

Thanks for your question. Yes, as discussed in the video you can mix the two coolants. But if you want to get the full benefits of the Blue coolant (longer service interval), you would need to completely flush all of the green coolant out before putting the blue in. Thanks for watching and Stay Tuned!

[@thomaspanfil9185]

​@@FlatironsTuning Would one Flush with tap water? After a long tap water Flush there will probably be some tap water left in the system. Would that contaminate new Blue Coolant? Might one need to flush with Blue Coolant AFTER a tap water flush before installing the new Blue Coolant?

[@_RiseAgainst]

How does the stealership do a coolant flush with 50/50? I doubt they are using the green coolant on new cars.

[@reallifeproductions9776]

Lol stealership lol that's a good one

[@mikkovincecruz3906]

I Accidentally topped up blue coolant with green coolant can some one help me

[@FlatironsTuning]

You are fine. It would just be ideal to flush your coolant and fill back up with all Blue in the next year or two. No harm done. Thanks for watching and Stay Tuned!

[@gino4171]

Thoughts on the type RA short block? and is it truly capable of holding 400 whp+?

[@FlatironsTuning]

Thanks for the question. We cover that here: www.flatironstuning.com/blog/how-much-power-can-the-sti-type-ra-shortblock-hold Thanks for watching and Stay Tuned!

[@82_KID]

I put the green in mine. I mixed it 50/50 with distilled water. I have an EJ251.