Thread: Dot 4 or 5.1 ?
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Old May 25th, 2019, 20:48   #3
smarkc
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Last Online: Mar 19th, 2022 22:14
Join Date: Jun 2010
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Quote:
Originally Posted by barrybritcher View Post
5.1 ideally as it's higher temp. But DOT4 is cheaper. I'd rather do more frequent fluid changes with the cheap stuff. (every other year)

If you are tracking it then go for 5.1


DOT 4 230 °C (446 °F) 155 °C (311 °F) 1800 mm2/s glycol ether/borate ester

DOT 5.1 260 °C (500 °F) 180 °C (356 °F) 900 mm2/s glycol ether/borate ester
Thanks for your response - so is there anything special about Volvo's dot 4+ ? Is this equivalent to 5.1 ?
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