"TheOnelectronic" (theoneelectronic)
11/13/2014 at 18:37 • Filed to: None
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"TheOnelectronic" (theoneelectronic)
11/13/2014 at 18:37 • Filed to: None | 1
| 13 |
It's nerve wracking. On cold mornings the thing spends the whole drive pegged to the upper limit until the oil warms up a bit. I have no idea if this is a bad thing or not. FWIW, the upper bar on the gauge isn't red, like it is on the lower bar.
> TheOnelectronic
11/13/2014 at 18:44 |
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I always thought high oil pressure was a good thing.
Steve in Manhattan
> TheOnelectronic
11/13/2014 at 18:49 |
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My 300D went straight to the peg when you touched the 'gas' ... was supposed to.
RotRod
> TheOnelectronic
11/13/2014 at 18:49 |
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Totally normal. Cold oil is thick oil, which is what's giving you higher psi after first start-up. You could always switch to a thinner starting weight oil to help the pump get the oil up to the head from the pan quicker on cold mornings.
RallyWrench
> TheOnelectronic
11/13/2014 at 18:49 |
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Totally normal. Oil is thickest when cold.
RamblinRover Luxury-Yacht
> Steve in Manhattan
11/13/2014 at 19:29 |
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Yep. A sign of every diesel Benz ever.
mattc993
> TheOnelectronic
11/13/2014 at 19:34 |
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+1 for normal behavior.
I also noticed on my own vehicle that the normal resting place with a warm engine and 0 throttle would go down a bit as the oil wore out. On a fresh change warm/idle pressure would be a bit higher for a while.
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Steve in Manhattan
> RamblinRover Luxury-Yacht
11/13/2014 at 20:19 |
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Had a 250 and, briefly, a 280E - same thing. If it's not on the peg there's something wrong.
Racescort666
>
11/13/2014 at 20:21 |
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It generally is. One thing that's important is the placement of the sensor too. You could potentially have high oil pressure at the sensor but not somewhere else caused by a blockage or some other weirdness. Most engines are nowadays designed fairly well and get good oiling. The number 1 way to kill an engine is bad oiling so most new engines are designed with that in mind.
theandysho - drives a SHO
> TheOnelectronic
11/13/2014 at 23:22 |
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My Jeep does this, SOP for me. Let it warm up and it'll calm down. If it doesn't then start worrying.
V8Demon - Prefers Autos for drag racing. Fite me!
> TheOnelectronic
11/18/2014 at 17:48 |
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It's even MORE fun when you have a short in the wiring system. How about the low oil pressure warning sound coming on when you have over 20PSI @ idle after warm (supposed to come on under 10). It was a problem that had plagued the car for years and apparently I wasn't alone. Found that a connector in that circuit ran under the battery tray and had gotten wet and corroded causing stray voltage from the OTHER 2 circuits that went through the same electrical pigtail/harness. FUN.
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samssun
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12/21/2014 at 06:02 |
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High oil pressure is better than no oil pressure, but pressure is really just resistance to flow, and flow is ultimately what you want. So high pressure because you're pushing a bunch of oil is good, but high pressure because your oil is cold or higher weight isn't. A lower weight oil that drops oil pressure but flows more is better.
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samssun
> TheOnelectronic
12/21/2014 at 06:03 |
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It's letting you know your oil is about 100 degrees below its ideal range, and therefore not protecting your engine very well. Let it idle a full minute and you'll be worlds ahead in wear.
Kylemaro
> TheOnelectronic
12/21/2014 at 08:46 |
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in racing there is really no such thing as "too high" oil pressure. too low is more unsettling. as long as that gauge is always above halfway you're fine. it might be closer to the middle right around the time you need an oil change, this is not coincidental.