Originally Posted by David C
The performance of DOT5 is also very poor (it exists because of a US Military spec requiring vechicles to work without maintenance after being parked in a wet field for months on end).
DOT5.1 and "Super DOT4" are both synthetic, either will be fine.
Basic DOT4 is not synthetic, so is not ideal.
Crikey Dave you are a walking encylopaedia
My question was prompted by the fact that my GTA manual specified "Tutela Car Top 4 for Alfa Romeo" as the recommended brake fluid, but I was interested in upgrading the fluid for track use as long as it could be used day to day as well.
I don't have access to the manual right now but recollect "tutela car top 4 for Alfa Romeo" as being dot 4.1, but a web search isn't revealing a lot of info about it or the "tutela extreme dot 5" I was enquiring about.
I did find these two links.
..but confess to being less than familiar with the standards quoted.
"TUTELA TOP 4
Synthetic-based brake fluid for disc and drum braking hydraulic systems and power controls of cars, industrial and commercial vehicles, scooters and motorbikes. The product features a high boiling point (+270°C) and a low flowing point (up to –40°C) as well as excellent anti-corrosion, anti-rust and anti-oxidation properties.
SAE J 1703, SAE J 1704
Recommended by Fiat, Lancia, Alfa Romeo, Maserati, Iveco, Piaggion, Gilera
TUTELA EXTREME 5
High performance synthetic brake fluid for hydraulic braking systems and power controls of cars. The product features a high boiling point (+300°C) and a low flowing point (up to –40°C) as well as excellent anticorrosion, anti-rust and anti-oxidation properties.
SAE J 1703, SAE J 1704, IVECO STANDARD 18-1820, FIAT 9.55597, ISO 4925