Mittarissahan on viivat 5 asteen välein, joten eilisiltaisen pikaisen koeajon perusteella mekaanisella termarilla näyttää n. 89 kun sähköisellä näyttää yleensä n. 92-93. Katsotaan vähän pidemmän ajon perusteella tarkemmin.
Tuosta toimintaperiaatteesta löysin tämmöisen selityksen:
"– Electrically heated thermostats (map thermostats)
In an electrically heated thermostat, the wax in the work element is heated up both by the coolant and by means of electric heating. Thanks to this combination, the engine temperature can be regulated specifically according to load requirement. The electrical heating of the work element is controlled using various parameters from the electronic engine management.
The electrical heating of the thermostat causes the premature opening of the coolant circuit in situations where increased performance is required. Depending on the default setting, the engine can thus run in the partial load range at approx. 100°C – 110°C, for example, i.e. hotter than has previously been usual. This reduces consumption by between 1 and 2%. At full load, the temperature is reduced to approx. 80°C, allowing the power and specifically the torque to increase measurably by between 2 and 3%.
Almost as a side-effect, the change in the temperature of the coolant enables the air conditioning to operate in a more favourable temperature range, thus improving climate control in the passenger compartment."
