Went into the local dealer to get some Dot 3 brake fluid in preparation for some work and found out all they have and use is Mazda High Performance Dot 4 (0000-88-BF00) fluid for all vehicles. The bottle says compatible with Dot 3/4; however I was still surprised as my understanding(may be outdated/mistaken) was Dot 4 fluid may case issues with seals in vehicles spec'd for Dot 3? Anyways was wondering if anyone knew anything about this fluid - no offense to parts staff who are not always knowledgeable.

Also noted Canadian Tire is marketing various types of brake fluid under the OEM label and was wondering about the quality of that as well.