OM642 oil pressure, 2015 GL350

Subscribe
Mar 30, 2026 | 10:24 PM
  #1  
Just thought I’d share a few pics. I bought an oil filter cap off of Amazon, drilled a hole in it and screwed an inexpensive 1/8” gauge in it. Glad to say no leaks. I have a 2013 with 300k plus and a 2015 with 135k. Both SUV’s oil pressure readings were the same. I took the reading with an oil temp at 195F (for the idle & 2k rpm) give or take a few degrees. For the neutral WOT the oil temp
was a little low like, 165F.

Hit idle - 21 psi
2,000 - ~70 psi
2,900 - around 110 psi (not quite up to temp yet)



2,000
2,000
Reply 1
Apr 6, 2026 | 07:19 PM
  #2  
Quote: Just thought I’d share a few pics. I bought an oil filter cap off of Amazon, drilled a hole in it and screwed an inexpensive 1/8” gauge in it. Glad to say no leaks. I have a 2013 with 300k plus and a 2015 with 135k. Both SUV’s oil pressure readings were the same. I took the reading with an oil temp at 195F (for the idle & 2k rpm) give or take a few degrees. For the neutral WOT the oil temp
was a little low like, 165F.

Hot oil pressures:
700.R - ~21 psi
2,000.R - ~70 psi
2,900.R - ~ 110 psi
These are nice available pump pressure that can help spray cool the pistons.

Particularly important at driving Rpm (1500 to 2500R).

110Psi is a high pressure... is this pump Max ??
Reply 0
Apr 6, 2026 | 07:39 PM
  #3  
Seems high.


Reply 0
Apr 6, 2026 | 08:54 PM
  #4  
higher than spec
Above specs in Bars translated into Psi as...:
  • 700Rpm ~ 4.5Psi
  • 3000Rpm ~ 45Psi

What oil viscosity was used... W30 /W40 / W50 ??

The Max pump pressure relief should not be affected by anything... 110Psi really??
Reply 0
Subscribe
Currently Active Users (1)
 
story-0

6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-1

Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-2

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-3

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-4

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-5

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-6

Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-7

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-8

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE
story-9

10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE