[EndlessAzure]

This is normal and to be expected on all cars.

Nominal voltage for a fully charged battery is between 12 and 13 volts, depending on your battery.

Alternator output varies based on load, and will vary between 12v min to ~14v max. The higher voltage also to facilitates car battery charging.

Electronics you plug into the car should be able to handle this variation; automotive application electronics from reputable companies should be designed for it.

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The manual says to check engine oil level when the engine is completely cold, if possible. If not, wait at least 30 minutes for the engine to cool to evaluate your oil level. When the car has just been run, the oil is still distributed throughout the engine passages. Once the engine has cooled, the majority of the oil will have returned to the reservoir for evaluation.


The same goes for engine coolant level. When the engine is hot, a meaningful portion of engine coolant has left the closed part of the system and is in the reservoir due to elevated temperatures. Once the engine cools, the coolant will be drawn back into the system. This means that, if you top off your coolant when the engine is hot, you risk overflowing from the reservoir at a later date. Alternatively, if you only check coolant when the engine is hot, you might be actually be low on coolant when the engine is cold