Comma Xstream G48 coolant is the correct spec if you want to save a couple bucks over BMW coolant.
Pros: correct spec, saves money
Reviews of Comma parts For Business
Average Rating
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The manufacturer's average rating is calculated based on ratings of all its spare parts. It determines the place in the manufacturer ranking
3.5
Manufacturer Ranking
-
4
Spare Parts
2
Country
UK
Spare Parts
I use comma g48 in mine. Compatible with BMW coolant and seems to work fine and is a decent price if you buy it neat.
Pros: works fine, decent price
Vehicle:
BMW
I might try comma motorsport 5w50 when the summer comes though.
Pros: better protection
Coolant ran out and since using this coolant (which was selected based on Halfords recommendation) the coolant has been running out weekly (with no obvious leaks) and the temperature gauge hitting the red after 10 minutes of driving. Not had any issues previously. Does using the wrong coolant cause these problems, or is there potentially something wrong with the coolant system?
Cons: coolant running out, engine overheating
Vehicle:
Skoda Fabia
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Owner reviews of Comma products
The Comma brand is registered in UK. Official website is not specified yet.
In March 2026, PartReview recorded 4 reviews across 2 parts by Comma. Average rating — 3.5 out of 5.
Comma is not yet in the PartReview manufacturers ranking due to insufficient reviews.
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