Building oil pressure after a service ?

The car pretty much does what you want it to do, every time it starts.

MG1 is a powerful motor used for cranking the engine. Unlike a typical underpowered starter motor, MG1 can comfortably crank the engine at near normal idle speed, bringing the oil pressure quickly to nominal levels, before the ECM begins injecting fuel and triggering spark.

 

Whatever floats your boat...

 

What makes you think the oil pump and all the ports completely drain when you change the oil?
Drain the old oil out, remove old filter, fill new filter with fresh oil and install. Add oil to engine and fire it up. There's plenty of oil film remaining on the engine components to protect them for the time it takes to start oil flow again.

Easy squeezy. No damage done....

 

have you tried maintenance mode?

 

^ What @TMR-JWAP said. When I change oil, I always manage to get the new oil in during the same month as when I drained the old. And I'm not using antique oil that my grandpa left to me.

Modern motor oil can leave a protective film for a very long time.

Now, I've shared your concern with other, older engines. I've got some garden equipment that only runs a few hours a year. I do think it's worth priming those.

But a modern, daily-driven car with modern oil? Nothing to worry about.

 

With a horizontally mounted cartridge filter?

 

Attached is the Repair Manual Instruction for oil change.

No mention of a need to prime then engine with oil.

Big mention of the little metal clip, which in fact does nothing. Mention too, of a the flat spot on the housing threads, tilting the housing to drain when removing, also pretty much pointless.

The main takeaways I think: be sure to get the new O-ring in the right location, and oil it well. And use a torque wrench.

 

There's nothing wrong with what you're doing -- but you're not preventing any damage.

What you're hearing on that first start is not metal-to-metal contact.

 

I get metal clanks also after a fresh crankcase drain and refill. RMB got the clanks also when I helped him changed oil at a meetup, we use different brand oil and filter by the way.

 

It is metal to metal. I heard it twice on 2 different Prius, it’s an alarming scraping sound.

 

The metal clip on the oil filter housing is keep the housing from backing out from vibration.
If it's tightened correctly, it won't, but it's a safety thing.
I remove it before putting the socket to remove the housing on, it makes it easier.
If I had a lift, I probably wouldn't need to remove it.
I only snug it up after the housing bottoms out, then install the clip.
I've done 6 or 7 oil changes and it hasn't come loose. And only the first oil change I did was it
hard to remove the housing because someone else used there 3 foot breaker bar to tighten it to 4000 ft.#'s!

 

I never even notice the clip anymore. It's there, but doesn't get in my way or anything. I'm using a conventional-looking Honda socket, fwiw.

 

OK

 

Wondering if a Scan Gauge can readout oil pressure, or is the sensor just an on-off pressure switch for the idiot light?

 

The car is only equipped with an on-off switch for the emergency low pressure warning.

Most cars don't have pressure gauges because they don't need them. It might be a shock, but it turns out that millions of dollars of engineering over a few decades actually worked, and we have hundreds of millions of cars still starting and running every day. All without priming, all without gauges.

@Juntuner you could use Techstream to set the car up for a compression test. That way the computer will understand that you just want to spin the crank without starting up, and it'll help you do this without causing unnecessary errors or complications.

The downside is that hooking up a laptop with Techstream is already a bit complicated for an oil change. I can't think of a simpler way.

 

TMR's profile says a Gen 2, so a 1NZ engine with the nice vertically mounted filter. I admit I used to fill that one myself before installing.

Try to fill a Gen 3 2ZR engine's cartridge filter before installing, and you just end up oiling your armpit.

 

He says the car in question is a gen 3.

I just put in a fresh oil filter, 4.2 litres in crankcase, works.