M1 5w-40 FS may be too much.

[Fabulous50s]

Chrysler Pentastar in my work van. I connected a scan tool for an unrelated radiator fan issue. Looking at live data I discovered 83psi oil pressure on a 45F cold start. The 2 speed oil pump always seems to be in high volume mode below 1100 RPM.

Normal operation oil temp is 195F and idle oil pressure (high volume mode) is 38 PSI. Running down the highway around 2000 RPM (low volume mode) is 40+ PSI.

So, I'm going to go back to a 5w-30 and see what pressures are. I've got 2500 miles on this OC so far, so I'll wait until hotter weather and see what temps and if anything is different. I'd expect temps to not fluctuate that much with the infamous water to oil cooler.

 

[We're Metals]

You're worrying about a non existent problem. "Cold" operation, a 5w-30 and a 5w-40 operate similarly.

 

[Slick3914]

That’s totally normal.

 

[Klutch9]

If your normal oil temp is 195f you do not need to run a 40 grade in that engine.

 

[BornSlippy]

I would see over 70psi on a cold start using 5W-30 in 2012 Pentastar.

 

[Rand]

This is the reason companies dumb down/ remove information
dummy gauges, idiot lights etc.

People see info and think there is an issue when in reality its non-existent.

 

[Fabulous50s]

85 psi and a known issue with leaking oil filter adapters.....

Surprised me that the oil pump didn't go into lower pressure mode with pressures that high.

 

[scrllock]

The pressure doesn't dictate the mode, the mode dictates the pressure... It's working as intended.

 

[lakestone]

Chrysler Pentastar in my work van. I connected a scan tool for an unrelated radiator fan issue. Looking at live data I discovered 83psi oil pressure on a 45F cold start. The 2 speed oil pump always seems to be in high volume mode below 1100 RPM.

Normal operation oil temp is 195F and idle oil pressure (high volume mode) is 38 PSI. Running down the highway around 2000 RPM (low volume mode) is 40+ PSI.

So, I'm going to go back to a 5w-30 and see what pressures are. I've got 2500 miles on this OC so far, so I'll wait until hotter weather and see what temps and if anything is different. I'd expect temps to not fluctuate that much with the infamous water to oil cooler.

I'll let you in on a little secret: Mobil 1 ESP 0W-30 is that engine's best friend. HTHS of 3.5 cP, unbelievable cold start performance, not too thick, NOAK is 8.4%, it doesn't shear. Wally World has it.

 

[ka9mnx]

This is the reason companies dumb down/ remove information
dummy gauges, idiot lights etc.

People see info and think there is an issue when in reality its non-existent.

Right. Put some painters tape over the oil pressure gauge.

 

[4WD]

Right. Put some painters tape over the oil pressure gauge.

I leave my Pentastar (Jeep) with the oil pressure on display …
It’s very weird compared to my GM’s which seem demand related.
On my 5.3L - nail the gas and it goes high stage …
The Pentastar will jump to high stage in all kind of modes - especially until it gets hot - regardless of outside temps. It does hit 80 psi often …
I will say there was no difference in pressure going from 0W20 to 5W30 …

 

[Fabulous50s]

I'll let you in on a little secret: Mobil 1 ESP 0W-30 is that engine's best friend. HTHS of 3.5 cP, unbelievable cold start performance, not too thick, NOAK is 8.4%, it doesn't shear. Wally World has it.

I started a thread about FS vs ESP actually for general DOHC chain driven engines. I think I have about 50qts of FS in my hoard, I'll try ESP on the next OCI. I have a lot of engines which I can use the FS in still. I may need to thin out the stash....