Valvoline Zerex G40 50/50 Prediluted Antifreeze 1 GA
$20.99
size1 ga
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4.8 out of 5 stars with 24 reviews
5 out of 5 stars
2 February, 2026
originally posted on Valvoline
Coolant, '18 VW GTI
[This review was collected as part of a promotion.] Exactly what I needed. Best price I could find at the time!
5 out of 5 stars
7 May, 2025
originally posted on Valvoline
Great!!
Dropped my operating temps a tick on the coolant gauge
5 out of 5 stars
17 November, 2024
originally posted on Valvoline
COOL IT
Best fifty fifty cooling additive on the market. Great for any year vehicle
3 out of 5 stars
5 November, 2024
originally posted on influenster.com

Use in recommended vehicles
[This review was collected as part of a promotion.] Works really well in the vehicle great product. It only recommended in certain vehicles be sure to use in only those vehicles. Seems to be safe and durable.
5 out of 5 stars
13 May, 2024
originally posted on influenster.com

Good stuff !
[This review was collected as part of a promotion.] This is great value for money based on size the comparability is good i used it for both of my cars. Very durable. It’s effective and safe. I’d use in the future
5 out of 5 stars
9 May, 2024
originally posted on influenster.com

Worth the money
[This review was collected as part of a promotion.] Got this anti freeze for my wife’s new car so I had it incase I need to top it off . You can’t go wrong with valvoline products and they are affordable.
4 out of 5 stars
9 May, 2024
originally posted on influenster.com

G12/13 compatible, identical to the G12++.
[This review was collected as part of a promotion.] From what I've been able to find out with research online, this G40 coolant is almost identical to the G12++. I recently changed my timing belt and coolant pump, and after a flush, refilled with the G13 Pentosin (purple), and this is compatible with that coolant. I knocked off a star because I understand the convenience of the 50/50 blends, but I hate the fact that I'm paying close to the same price per gallon for half the coolant.
4 out of 5 stars
8 May, 2024
originally posted on influenster.com

Awesome formula
[This review was collected as part of a promotion.] Superb formula! And ready to go, with no dilution required. My car definitely needed a little boost and this came at the perfect time! I tend to manage a steady upkeep with my car, so this antifreeze/ coolant is definitely worth it. I appreciate how big this container is.
4 out of 5 stars
8 May, 2024
originally posted on influenster.com

Good stuff
[This review was collected as part of a promotion.] Not sure what to say. This coolant did its job like it was supposed to. It did seem more expensive than necessary. I would recommend to a friend. I couldn't tell a difference from traditional coolant.
5 out of 5 stars
5 May, 2024
originally posted on influenster.com

Great product as good as oem
[This review was collected as part of a promotion.] This stuff works just as good as the oem coolant and costs much less. Matches in color so you are not looking like someone messed up and put the wrong stuff in. All around great product!
5 out of 5 stars
17 April, 2024
originally posted on influenster.com

Zenex G 40
[This review was collected as part of a promotion.] The is the real deal it's great and is good for tge anti freeze for your luxury car to keep it running smooth all day and night the color makes it visible
5 out of 5 stars
12 April, 2024
originally posted on influenster.com

Great
[This review was collected as part of a promotion.] This is my go too brand for automotive products, I am very happy with this product as far as value I always spend the money to get quality and this isn't different
4 out of 5 stars
12 April, 2024
originally posted on influenster.com

Great
[This review was collected as part of a promotion.] Great product i just gave four stars because i wish they give for more brands and is not like you need coolant every day but still is a great product
5 out of 5 stars
7 April, 2024
originally posted on influenster.com

Improved performance overall rating is 5 stars.
[This review was collected as part of a promotion.] Excellent quality antifreeze. Took car to shop to change over factory antifreeze to the Valvoline Zerex G40 and the performance of my vehicle has improves immensely. Extremely happy with the product and look forward to enjoying my vehicles improved performance.
5 out of 5 stars
3 April, 2024
originally posted on influenster.com

Made just for my car
[This review was collected as part of a promotion.] Valvoline has always been a company that I use and trust for auto oil. I’m not sure if I even knew they made an antifreeze but I will be using this product going forward. This blend is specifically for VW which I recently purchased and that is awesome. Knowing that it is for my specific car makes me feel comfortable. I highly recommend this product.
5 out of 5 stars
3 April, 2024
originally posted on influenster.com

Works great.
[This review was collected as part of a promotion.] Works great. I love the fact that it is already perfectly mixed so that I don't have to worry about my ratio being off. Great for performance with my import.
5 out of 5 stars
31 March, 2024
originally posted on influenster.com

Best antifreeze for older Audi
[This review was collected as part of a promotion.] This is the only antifreeze on the market that I would trust to put in my Audi. It has all of the necessary ingredients that Audi requires in an antifreeze. 
5 out of 5 stars
31 March, 2024
originally posted on influenster.com

Great Zerex Z Coolant
[This review was collected as part of a promotion.] I received this Zerex G40 Phosphate & Nitrite Free 50/50 Ready-to- use Antifreeze/ Coolant 1 Gallon from Influenster free in exchange for my honest review. I used this Zerex G40 Phosphate & Nitrite Free 50/50 Ready-to- use Antifreeze/ Coolant in my vehicle and noticed the temperature is much lower. I like that I don't have to add water to the mixture. It's already diluted and can easily be poured into the engine Coolant reservoir. It's made in the USA and specifically made for my vehicle. I was able to fill up my reservoir and still have plenty left over for another time. I'm am pleased that it has rust and corrosion protection. This Zerex G40 Phosphate & Nitrite Free 50/50 Ready-to- use Antifreeze/ Coolant has been a great addition to my vehicle, and now I'm completely protected during the summer and winter months.
5 out of 5 stars
30 March, 2024
originally posted on influenster.com

Great
[This review was collected as part of a promotion.] Works as expected great product from a trusted brand! Great value and doesn’t contain harmful chemicals. Yes I would recommend this product. Thumbs up
5 out of 5 stars
29 March, 2024
originally posted on influenster.com

Antifreeze
[This review was collected as part of a promotion.] Make sure not to add Water to this prediluted antifreeze. This is a good antifreeze for my car. My car performs well with it. This is definitely a brand I can trust with my car.