One more thing to add to the list:
Glow plug based coolant heater
I installed one almost 2 years ago and use it year round to top off the coolant temp, after using the 230V AC block heater + oil pan heating pad. More important, speeds up engine warming when you have a cold start with nowhere to plug in the block heater
I also use it when engine braking, getting some extra heat for free.
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e·co·mod·ding: the art of turning vehicles into what they should be
What matters is
where you're going, not
how fast.
"... we humans tend to screw up everything that's good enough as it is...or everything that we're attracted to, we love to go and defile it." - Chris Cornell
[Old] Piwoslaw's Peugeot 307sw modding thread