Some things I've noticed from watching my new gauges in relation to the oem gauges

1) The coolant temp needle lifts off the 50 bottom marker when the coolant temp is actually around 35 (compensated for sensor position, say 40)

2) I always took this time to be a good time for the engine to be warmed up a bit, but the oil is still only 25 to 30 degrees in the sump.

3) When the needle hits 90 and stays there, the coolant temp (where I have the sender about 10" from the oem sender) varies from anywhere between 72 degC on a gentle run, to close to 80 degrees on a longer run, especially long uphill bits and on motorways. This variation is never reflected in the gauge by the speedo....

4) It takes at least 15 minutes or more for the oil to reach it optimum working temperature - which in my case is around 75 degrees celsius, in the sump. I now don't give my car any beans until oil temps have exceeded 40 degrees celsius

5) oil & coolant stay warm for a LONG time after switching the engine off. Sadly I sometimes watch my coolant gauge drop in temp when I pull up after a drive. It drops 0.1 degC every 45seconds to 1 minute.

I might think of more, but the gauges rock! Saw 700 degrees on EGT weds night. highest yet, but I'm led to believe this isn't a bad temperature. 800+ isn't so good on a sustained run though.

Yep, most people don't consider the oil temperature. Many think, OK the guage is near normal, give it beans. Most cars, the oil takes longer than the water to come up to temperature.

Chris

It takes at least 15 minutes or more for the oil to reach it optimum working temperature - which in my case is around 75 degrees celsius, in the sump.

I wonder what the equivalent time is for a petrol engined Fabia. Diesels take longer warming up than petrols, I think. It is one of the reasons I chose petrol, because I do more short trips than long trips.

Yep, most people don't consider the oil temperature. Many think, OK the guage is near normal, give it beans. Most cars, the oil takes longer than the water to come up to temperature.

Chris

In terms of speed of warming up, coolant is a fair bit faster. I like watching the gauges shoot up (relatively fast given they read to the nearest 0.1 degree) from cold.

I would say when the coolant hits 70 degrees the oil is still back at about 50, but I think it would be OK to use full throttle at this point.