Sunday, 01 August, 2021

Best DOT 4 Brake Fluid and Why


We already covered different brake fluid types and their benefits in another article (What Brake Fluid is Best for my Motorcycle). This time we’re looking specifically at the best DOT 4 Brake Fluid.

If you read the last article, you know DOT 4 Brake Fluid is Poly-Glycol-Ether based, like DOT 3 before it, and DOT 5.1 after. The latter provides generally better high temperature performance at the expense of longevity. (i.e. it requires flushing & replacing more often, on average.) To some, the extra hassle outweighs the benefits.

Best Premium DOT 4 Brake Fluid

If you like the longevity of DOT 4, but want better performance than even the average DOT 5.1, I recommend Motul RBF 660 wholeheartedly.

It’s certainly not the cheapest DOT 4 Fluid available, but it is the best when you want all out performance from your motorcycle’s braking system. The advertised 617 °F minimum dry Boiling Point is nearly 100 degrees higher than the average DOT 5.1 fluid. That puts it over 170 °F higher than the average DOT 4!

Best Budget DOT 4 Brake Fluid

Don’t need MotoGP level motorcycle stopping performance, but want something better than stock and cheaper than the Motul RBF 660? Check out Pentosin Super DOT 4.

With a dry boiling point of 509 °F it performs nearly as well as DOT 5.1 under hard riding conditions, and it’s less than half the price per ounce of the Motul. Better yet, you can usually find Pentosin at the local parts store if you need some in a hurry.

Best Overall DOT 4 Fluid:

Another one of the best DOT 4 Brake Fluid options, and probably the most bang (or stop) for your buck is ATE Type 200.

Previously ATE Superblue (named so because it was actually pale blue), Type 200 replaced it when the US DOT specified that all Glycol based brake fluids be clear to amber in color. It was a favorite among the motorcycle racing community then, and it still is today. With a 536 °F minimum dry boiling point, it’s a bit better performing than the Pentosin, but it’s also a few dollars more expensive per quart. The ATE is still cheaper than the Motul, though, so it provides a nice middle ground.

What’s your favorite DOT 4 fluid choice, and why? Let us know by leaving a comment in the box below!

One comment on “Best DOT 4 Brake Fluid and Why

[…] to find a DOT 4 fluid with a higher boiling point than listed. In fact, as we mentioned in the Best DOT 4 Brake Fluid article, some fluids like Motul RBF 660 have a much higher advertised dry boiling […]

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