sleepy2 Posted May 9 Share #1 Posted May 9 Bought Dot 4 Synthetic brake fluid but didn't realize until I got home. Can we use it or do I have to take back and get regular Dot 4???? Link to comment Share on other sites More sharing options...
Freebird Posted May 9 Share #2 Posted May 9 I THINk that dot 3, 4, and 5.1 are compatible. 1 Link to comment Share on other sites More sharing options...
CLEON Posted May 9 Share #3 Posted May 9 Dot 3&4 are compatible as the difference is dot 4’s higher temperature rating. Dot 5 being silicone based is NOT compatible with either of 3 or 4. Link to comment Share on other sites More sharing options...
N3FOL Posted May 9 Share #4 Posted May 9 I've been using Dot 3 or 4 synthetic on both my RSV and SVTC. No issues to report. All ok. Link to comment Share on other sites More sharing options...
Steve S Posted May 9 Share #5 Posted May 9 According to the reports I have read, all brake fluid is synthetic. Make to use the proper DOT number for the application. Steve. Link to comment Share on other sites More sharing options...
CLEON Posted May 9 Share #6 Posted May 9 just don't get confused with SYNTHETIC and SILICONE (DOT 5). Link to comment Share on other sites More sharing options...
sleepy2 Posted May 9 Author Share #7 Posted May 9 Thanks for replies! yes I knew not to use Silicone but to use Dot4. the one I bought is Prestone Dot 4 Synthetic! Was checking out sluggishness of towing trailer(chugging)so pulled plugs and then things started to snowball into general maintenance procedures, plugs,air filter cleaning(K/N),brake fluid change,deep clean plus a couple broken tabs on lower fairing,etc..... Link to comment Share on other sites More sharing options...
saddlebum Posted May 20 Share #8 Posted May 20 (edited) Dot 5 and dot 5.1 are not the same. Dot 5.1 is glycol based and fully compatible with 3 and 4 but has a higher boiling point and lower moisture absorption rate. It is often used in performance cars. I currently have 5.1 in my rear brake and find the brake more responsive. It is also more expensive. DOT 5 IS SILICONE BASED and should never be used. Edited May 20 by saddlebum Link to comment Share on other sites More sharing options...
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