Choosing the right brake fluid can be confusing. If you’re not sure what you’re looking for, it’s honestly a bit overwhelming. If you’re asking yourself, what’s the best dot 4 brake fluid?, never fear. We’re here to help. We researched the top rated products to help you figure out which one is best for your vehicle. Before we get into our reviews, let’s take a look at the key features you need to know about brake fluid.
DOT: DOT stands for Department of Transportation and is a standardized way to classify these fluids. DOT 3 and DOT 4 are for passenger cars and trucks while DOT 5.1 is for racing vehicles. DOT 5 is used for military vehicles.
Synthetic: There’s some debate over this. Some people only classify silicone based fluid as synthetic and glycol based formulas as non-synthetic. Popular opinion seems to be that all brake fluid is synthetic since it’s not found in nature. We agree.
Non-Silicone: This is pretty important. DOT 5 fluids are silicone based and those are the ones that are used in military vehicles. So, for passenger vehicles (DOT 3 and 4), you can’t use a silicone based fluid.
Mixable: Here’s the deal. You can mix down but not up. So, if your car uses DOT 3 and you want to add DOT 4, go ahead! But don’t add DOT 3 if your brake system uses DOT 4.
Package Size: These vary from 16 to 32 ounces. Some of these last a long time before needing changed. If that’s the case, smaller bottles are better so the unused fluid doesn’t sit on a shelf or go to waste.
Money Back Guarantee: Unfortunately, offering a money back guarantee isn’t something that most of these manufacturers offer. But once you understand that brake fluid isn’t as complicated as you might think it is, that makes sense.
Now that you know more about brake fluid, let’s move into our reviews. If you’ve used the best brake fluid tester and know it’s time for a change, make sure to check out our top and budget picks to save some time. They’re right at the top of the list and give you some idea of the range that’s available. Stick around if you have time, we really cover a little bit of everything. Ready? Let’s get to it.