coolant e60

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Is there any way to increase the longevity of the thermostats as this seems to be an issue on these diesel motors.

Seems that if you don't check the temperature gauge you won't know that there is an issue.

My consumption went up. I am also worried about the same, i fitted an OEM thermostat with BMW coolant, never drive the car hard when cold, it parks in a garage at night and underground parking during the day so its not like it gets exposed to extreme heat and cold.

I changed these at 153000, so it hasn't lasted 45000km..... :skit:

Mine is at 195k kms and have no idea if the thermostat/s have ever been changed??:skit:
What should the running temp be more or less when warm... I thought that if it was cooler it was better? Also, how does one know what the temp is without a temp gauge?

mine is running at 87 degrees when on the highway but while idling in traffic I get 92 degrees

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I have used the above product and found my fuel consumption has decreased in both my Polo TDI and 530D

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Those temps are perfect.

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