[G2Turbo]

Originally Posted by schwejo

Thanks for all the good reading…

I sure like this thing: Mityvac

It’s an attachment for a Mityvac fluid extractor, but can’t see any reason why you couldnt make it work just as well with a Pela. If you don’t have a dedicated bleed kit then this is a well spent $20 addition to a fluid extractor.


The Valvoline “synthetic” fluid claims to not need this level of a flush to use it, so what gives? Is my information flawed or is the Valvoline synthetic fluid some type of blended or other product? Any experts care to shed some light or share their experiance? thanks

A Mityvac is a poor device for bleeding brakes in my experience. It uses suction to pull fluid. It's not possible to see if air bubbles are in the lines or any water dropplets are present (yes, water drops). It doesn't work so great because the M/C piston is not moving, opening and closing the ports to let fluid thru. It might even be possible to add air to a brake system, using a vaccum. When the bleeder valve is opened, it pulls air between the threads of the valve. I think a tradtional bleed/flush is much safer, plus the ability to build up PSI helps to purge contamination better. Better yet pay a tech $80 to power flush the brake system, or buy the proper tool


I think the conditions describe the old silicone fluid. Being an inert substance it doesn't swell the seals like normal DOT 3 or 4 fluid does. One of the reasons it would often leak. I've never done anything more than a standard two man flush with the Valvoline fluid and no problems yet, or signs of trouble.

Almost certain that even though it's synthetic it's formulated to meet DOT specs and compatibility requirements. I don't know what it's made of. The Feds are very strict about automotive braking systems with one exception I'm aware of: aftermarket brake pads (non OE). Not sure why.