The Best Coolant in the World and Why

Coolant explained and which type is best for your car's cooling system, DIY with Scotty Kilmer.

How coolant and the cooling system works in your car. Oat coolant versus Hoat coolant versus inorganic acid coolant, which is better? The history of car coolant. Hoat coolant and oat coolant explained. DIY car repair with Scotty Kilmer, an auto mechanic for the last 50 years.

Thanks for watching! Scotty Kilmer, gives you a chance to win a car product, by entering in this weekly giveaway.

⬇️Scotty’s Top DIY Tools:

Mechanic Monday Official Rules:
1. The Mechanic Monday Giveaway will begin March 19th at 7 am CST and run for six days, ending on March 25th at 9 am CST.
2. There will be one winner of a 1 gallon of coolant valued at $18.
3. To enter, simply leave one non-offensive comment in the video below.
4. Only one comment per entrant is allowed and more than one comment will not increase your odds of winning.
5. Must be 18 years or old at the time of entering this giveaway OR have your parents’ permission.
6. This giveaway is open worldwide.
7. Any offensive, obscene, or lude comments will be ineligible to win the giveaway.
8. The odds of winning are based on how many people enter the giveaway.
9. The winner will be chosen at random.
10. The winner will receive a reply to their originally posted comment in the video and will also be announced in a newly posted comment by Scotty around Sunday 9 am CST. The winner will be required to respond to Scotty’s comment within 24 hours or their win will become void and a new winner will be chosen at random.
11. The winner will be required to give Scotty their full name and mailing address to receive the prize.
12. Entrants that use computers, programs, or any other means of cheating by adding additional comments through more than one account, will be ineligible to win the giveaway.
13. Standard mailing time from the win date and the date received, will depend on the winner’s geographic location.
14. This giveaway complies with all applicable federal, state, and local laws, rules, and regulations, including U.S. sanctions.
16. This giveaway is in no way sponsored, administered, or associated with YouTube. Entrants are required to release YouTube from any and all liability related to this giveaway.
17. Privacy notice: any and all personal data collected from the entrants and winner will only be used to announce the giveaway winner. The winner’s full name and address will only be used to mail the giveaway prize to the winner and nothing else. If you do not agree to these terms, then do not enter the giveaway.

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⬇️Scotty’s Top DIY Tools:


⬇️Things used in this video:

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Scotty on Social:

[hayleybutler]

I just went and purchased genuine Toyota coolant “the pink stuff” because I just realised that the local mechanic didn’t do it when I had my car serviced. All my local stores had green coolant. This video reinforces that I made a good choice. I’m dumb when it comes to cars, but you’ve taught me so much!

[gregfarnsworth]

Scotty is spot on with the coolant. As a ford mechanic, I had a Taurus that kept coming back with a leaking heater core. I replace it 3 times in a year. Came to find out that the electricity it created would corrode the heater cores and eventually cause them to leak. (had to add a ground wire to the recovery tank).

[AngelJimenez-ywmp]

I love these history lessons, thank you Scotty!!

[girohead]

THANK YOU! I'm a proud DIY owner of a Toyota with 155k miles (do my own work thanks to you), and thought it was about time to do fluid. I thought I read in the manual that it didn't need to be changed, but assumed they didn't expect someone like me. This is the best review I've seen by far and I've been searching auto repair forums and am now amazed at how many 'techs' had no mention of this, even when I asked the difference (between the pink and the green stuff). My only question now is if I can find a good alternative to genuine Toyota fluid which is twice as much out here. You gotta be crazy to let these shops touch your car. I started doing my own stuff (again, I did as a kid) because I was tired of the upselling: 'When was the last time you changed out the air in your tires? We recommend that with every oil change'....GONE.

[saabstory]

I personally use Zerex G-05 in my car. I also really like to change it far more often than recommended even though it may be a waste. I do a full flush when I first buy a car and then another every 1-2 years depending on how hard its been driven. I just like to make sure the system is clean because I'd rather replace coolant every year or two than hoses, thermostats or water pumps every 5 or so years.

[DixieNormous]

First time I've even hear of HOAT coolant, thanks Scotty.

[incrediblesloth]

That was super informative. I didn't know that. I knew about the green and dexcool and such but the HOAT stuff sounds pretty neat. This is one of my favorite channels. I learn so flippin' much. Thanks for making these videos, Scotty!

[steveberkoff]

I always have more confidence on auto repair after listening to and watching your clear, easy to understand videos. Thanks Scotty!

[alexandercopeland]

I just want to say I have been a mechanic for about 16 years and here in the past couple of months learned a lot more, Thanks so much Scotty!!

[bum]

Scotty you have inspired me to be more intrested in mechanic's. Thank you

[VictorDunkle]

The chemistry of coolant is a very interesting topic to study.

[jamespitman]

HOAT is wonderful stuff. Love it in my cars. My poor jeeps never seem to keep coolant systems intact long enough to run it.

[NintendoMario]

Just recently changed my coolant out on my 2012 Toyota Tundra. Did it myself. Very easy job! Rather pay the additional $3-4. Versus paying $200+ for a mechanic to change it out. Thanks for helping me save money over the last several years!

[artreyes]

Scotty not gonna lie I came across by you on accident recently but every since I been watching your videos it make me understand more about my car that I just got from my uncle and let me tell you this there a lot of problems with it

[Teezjunk]

You talking about Grandpa brought back memories. I remember my dad used to always change the antifreeze in his old Caddy. Thanks for the info. I would like to replace the coolant in my 2001 Camry to the HOAT formula. As a woman, I want to do everything that I can do to avoid having to take my car in to the shop for repairs. I have learned so much from your videos. Thanks again.

[timallen]

Thanks, Scottie for telling us all about the various coolants out there.

[sully]

huge believer in changing all the fluids in your cars, not just the engine oil, great video

[thFTW]

Lots of subs within the last year! Congrats scotty.

[KMW]

Im a big fan since last year..also been a shade tree mechanic for 50+ years...and Ive learned a LOT from you brother....