What would be the cause of a low/no oil reading on the dipstick after an oil change?

deangeloagentB to Mechanic Advice@gearhead.townEnglish · 10 months ago

Hi folks. I have three vehicles, which all exhibit different behaviors after changing the engine oil:

Silverado Duramax: Immediately after changing the oil, I get a good reading on my dispstick. No issues here.
Tundra: Immediately after changing the oil, I get no reading on the dipstick. It shows that there is no oil. However, I start the car and I see a normal reading on the oil pressure gauge on the dashboard. After driving the car for a bit, I finally get a reading on the dipstick.
Hyundai Palisade: Immediately after changing the oil, I get no reading on the dipstick. I don’t have an oil pressure gauge in this car. But after driving it for a while, I get a good reading on the dipstick.

My questions are:

Is it safe to start the car without a positive reading on the dipstick? If not, what are the risks?
Why would some of our cars not show a positive reading after initially adding oil, but show a positive reading after driving it for a while?

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