I have some DOT 4 brake fluid left over from a Mercedes brake system flush. Will there be any issues if I use this Dot 4 to flush the system on my truck which now has Dot 3? I will end up with a mixture of Dot 4 and Dot 3 in my truck since some of the old Dot 3 will remain in the brake hydraulics of my truck.
Mixing Dot 3 and Dot 4.
- Thread starter George7941
- Start date
- Status
Not an issue.
It will mix just fine.
We are talking about your brake system... Buy dot 3 and take the loss of a few bucks.
Originally Posted By: mooferz
DOT 3, 4, and 5.1 are mixable. Only DOT 5 is incompatible with the rest.
+1
DOT 3, 4, and 5.1 are mixable. Only DOT 5 is incompatible with the rest.
+1
Originally Posted By: mooferz
DOT 3, 4, and 5.1 are mixable. Only DOT 5 is incompatible with the rest.
+2
DOT 3, 4, and 5.1 are mixable. Only DOT 5 is incompatible with the rest.
+2
Originally Posted By: crazyoildude
We are talking about your brake system... Buy dot 3 and take the loss of a few bucks.
I think if it was dangerous, it would be stamped all over the top and master cylinder.
We are talking about your brake system... Buy dot 3 and take the loss of a few bucks.
I think if it was dangerous, it would be stamped all over the top and master cylinder.
It says Dot 3 on the m/c cover.
I will go ahead and flush with Dot 4. After all it is my own truck and I don't mind experimenting on my own truck. I would hesitate to do that on other people's vehicles that I work on.
I will go ahead and flush with Dot 4. After all it is my own truck and I don't mind experimenting on my own truck. I would hesitate to do that on other people's vehicles that I work on.
I've flushed my system with DOT4LV and haven't exhibited any issues so far. I've also slammed the brakes on loose gravel to "flush" the ABS unit and bled the brakes again. Took me two bottles of this stuff due to the size of the reservoir.
Last edited:
I always replace DOT3 with DOT4 in my family's cars. I use Pentosin DOT4LV in the cars that have ABS brakes.
I happened to do the same with the G37 with the brake job, except using Castrol LMA DOT 4. Oddly enough, I can get it cheaper than a lot of DOT 3 no name stuff.
Mine says dot 3 only
- Status
