Startup after sitting LONG / Oil pressure

[GeekGT5.0]

That idle pressure is totally normal. Don't over think it.

Coyote tick is also normal. Been that way since 2011.

We had a 2011 GT, and I just don't remember it having such low oil pressure, I would of been surprised by it, I've had a ton of fox bodies and man 20psi oil pressure would of been a problem. LOL

The crazy part is, it has 100psi oil pressure on cold start at 50 degrees outside. Maybe they designed the pump to be low pressure high volume for fuel economy?

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[LouG]

For what its worth, worn bearings don't typically kill motors unless you've been doing stupid stuff.

9 times out of 10, a worn motor needs a rebuild or overhaul because of piston rings, loss of compression, etc.

I cannot remember the last time I heard a car knocking or needing new bearings that was not directly linked to loss of pressure at high rpm, over revving, etc etc. This excludes obvious things like BMW V8's and V10's that had known bearing clearance issues, etc. I am talking about a majority of engines built today.

I still pre-oil my oil filters when doing a fluid change, but I doubt its even that necessary, more of a feel good thing.

Your motor is experiencing wear far more during the warm up period than the one or two seconds of building oil pressure under initial first crank. Cranking the motor to build pressure is not going to help offset any measurable amount of wear compared to that 5-10 minutes of the fluid building temp and various metals expanding before final temp is achieved.

Now, if this was an older engine, I totally get it. Older motors had completely different clearances and engineering practices in mind. My Spitfire likely would've benefit from some morning cranks to build pressure. But a modern 5.0, I doubt it. The Coyote is just about the best thing Ford builds. Everything else may fall apart, but these motors are solid.

If you want to truly keep wear down on your engine, keep your change intervals around 5000 miles (depending on your situation ofc), don't lug your motor at low rpms, and don't use any silly oil additives in a bottle.
Otherwise, you're overthinking it which will lead you to the long long rabbit hole that is tribology, and before you know it you're on page 18 of some random BITOG thread with more questions than you started with. Its a fascinating rabbit hole, but its not worth going down.

A spun bearing can very definitely kill an engine. Once they seize a rod can break or a crank.

 

[robvas]

It wasn't really prevalent until gen 3.

Been a thing since gen 1. And even the 32V Cobras before that

 

[AZ_Ryan]

We had a 2011 GT, and I just don't remember it having such low oil pressure, I would of been surprised by it, I've had a ton of fox bodies and man 20psi oil pressure would of been a problem. LOL

The crazy part is, it has 100psi oil pressure on cold start at 50 degrees outside. Maybe they designed the pump to be low pressure high volume for fuel economy?

Your over thinking it bud. My s550 had identical oil pressure as my s650. Don't go down the new owner rabbit hole.

 

[franktank]

Your over thinking it bud. My s550 had identical oil pressure as my s650. Don't go down the new owner rabbit hole.

I’ve been down the rabbit hole on many topics with my car and realize overthinking was unnecessary and there were no issues. Just gotta realize not everything is a problem and enjoy it while I have it

 

[AZ_Ryan]

Been a thing since gen 1. And even the 32V Cobras before that

Yes, but the gen 3s really gave it attention. Do a search on the 6g forums. People damn near lost their minds over that shit.

 

[Cz_Ziemniak]

A spun bearing can very definitely kill an engine. Once they seize a rod can break or a crank.

Tell me you didn't comprehend what I wrote without telling me you didn't comprehend what I wrote

 

[GeekGT5.0]

Your over thinking it bud. My s550 had identical oil pressure as my s650. Don't go down the new owner rabbit hole.

Oh for sure, I'm sure they are doing it for the MPG credits. Upgraded oil pumps are in the normal pressure ranges. I'm not worried about it, it's only at idle, the moment rpm changes pressure increases into what I'd say is normal 30-100psi depending on throttle.

 

[LouG]

Tell me you didn't comprehend what I wrote without telling me you didn't comprehend what I wrote

(For what its worth, worn bearings don't typically kill motors unless you've been doing stupid stuff.)

 

[Cz_Ziemniak]

(For what its worth, worn bearings don't typically kill motors unless you've been doing stupid stuff.)

Normal wear and tear does not typically cause bearings to go bad before piston rings, cylinder bores, etc.

Obviously if the bearings are bad they could spin or cause low oil pressure. This goes without saying. If you read the entire post, you would not get hung up on this.

You are an adult, stop being pedantic. You know exactly what I meant.

 

[LouG]

Normal wear and tear does not typically cause bearings to go bad before piston rings, cylinder bores, etc.

Obviously if the bearings are bad they could spin or cause low oil pressure. This goes without saying. If you read the entire post, you would not get hung up on this.

You are an adult, stop being pedantic. You know exactly what I meant.

There's no need for ad hominem attacks. You made a statement that was incorrect. Excluding bearing wear in BMW engines does not strengthen your argument. Bearings can and do fail while other engine parts are still within tolerance. Less common now, but still happens.
"I Do cars" on YT has plenty of examples. And I saw it when I was on the tools.

 

[Cz_Ziemniak]

There's no need for ad hominem attacks. You made a statement that was incorrect. Excluding bearing wear in BMW engines does not strengthen your argument. Bearings can and do fail while other engine parts are still within tolerance. Less common now, but still happens.
"I Do cars" on YT has plenty of examples. And I saw it when I was on the tools.

No. Bearings almost never go before piston rings, cylinder walls, or often even head gaskets on many select motors - outside of external factors that prematurely wear them. Overrevving, oil starvation, etc.

If you don’t believe this to be a fact, then you’re simply wrong. Ive torn engines down with over 150,000 miles with near fresh bearings, and yet they burnt oil from leaky valves, rings, so on and so forth.

But by all means, tell me why I’m wrong

 

[LouG]

No. Bearings almost never go before piston rings, cylinder walls, or often even head gaskets on many select motors - outside of external factors that prematurely wear them. Overrevving, oil starvation, etc.

If you don’t believe this to be a fact, then you’re simply wrong. Ive torn engines down with over 150,000 miles with near fresh bearings, and yet they burnt oil from leaky valves, rings, so on and so forth.

But by all means, tell me why I’m wrong

Ok, our mileage may differ, as do our opinions and experience.

 

[Westphal]

"Only the Sith deal in absolutes". You both can be right at the same time if you refer to generalities and not something that always happens before something else.

 

[Cz_Ziemniak]

"Only the Sith deal in absolutes". You both can be right at the same time if you refer to generalities and not something that always happens before something else.

"Normal wear and tear does not typically cause bearings to go bad before piston rings, cylinder bores, etc." is pretty far from an absolute

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