[Argess]

I have to admit, I used DOT 5 (as per the manual) back around 1994. It's still in the car. I am a bit worried abotu changing due to potential seal damage.

On the OPs problem. If Master cylinder seals are going, he still gets same pressure to both front brakes, just not as much. If he has one caliper seal going, he will have unequal braking, BUT he will also have a brake fluid leak. Should see some on the floor I would think.

Does the car pull to one side when you use the brakes "light to moderate"? If there is something wrong with the brakes, one side compared to the other, it should pull to one side with light to moderate braking.