I'd chuck the Dot 4 and get some mineral oil.I received it today:
Apparently it uses DOT4 oil... and my disc brake currently use mineral oil... Can I mixes these 2 during bleeding?
Hech, on this bike I'm using Zippy compact with a pack at 72V20AH. In term of sag I only have 3V drop on full power at 2.5KW. So about 0.15V drop/cell on max power... Quite good but my pack is big
My brompton had these very nice konion. They were good too but had much more sag and were dropping to 65V under load (from 80V). Massive sag, but they were quite robust.
D8veh, shall I get this one?
http://www.ebay.co.uk/itm/Shimano-Disc-Brake-Mineral-Oil-Fluid-In-Dropper-Bottle-Burp-Bleed-Disk-Breaks-/221392885679?pt=UK_sportsleisure_cycling_bikeparts_SR&var=&hash=item338c0b57af