Results 1 to 7 of 7

Elevated Oil Pressure on Changing to Castrol Edge

This is a discussion on Elevated Oil Pressure on Changing to Castrol Edge within the Internal Engine forums, part of the LSx Technical Help Section category; ...

  1. #1
    Junior Member
    Join Date
    Sep 2009
    Location
    Dayton, Ohio
    Posts
    7

    Black
    1998 Trans Am Ram Air

    Question Elevated Oil Pressure on Changing to Castrol Edge

    So I changed the oil in the 1998 Trans Am to Castrol Edge recently (from Mobil 1, full synthetic). The oils are both 5W-30, but, with Edge, it seems the oil pressure is running higher than it did with Mobil 1 by about 10 PSI. On startup, M1 had maybe 45-50PSI, but Edge gives perhaps 55PSI. After things warm up, at idel, Mobil 1 gave maybe 30-35PSI, but Edge gives 40-43PSI. At perhaps 4500-5000rpm, Mobil 1 I think gave 45-48PSI, whereas Edge is giving 60-62PSI.



    Why would this be occurring if the two oils are of the same weight (5W-30)? What’s going on altogether? I am totally freaked out about maintaining excessive oil pressures, as I think that makes it more likely that my rear main seal (or similar seals) may fail. Am I correct to worry about the high oil pressures causing the rear main and other seals to fail prematurely?

  2. #2
    Junior Member
    Join Date
    Sep 2009
    Location
    Dayton, Ohio
    Posts
    7

    Black
    1998 Trans Am Ram Air

    so

    Should I just ride it out with this oil in the car until my next change (2000 miles), or should I immediately drain it out and put back in some Mobil 1?

  3. #3
    Yo Da Lin The Valley..... astyles's Avatar
    Join Date
    Mar 2006
    Location
    here
    Posts
    3,693
    2001

    pm Sarge and see what he says.....

  4. #4
    Senior Member ss~zoso~ss's Avatar
    Join Date
    Dec 2004
    Location
    )
    Posts
    9,128

    SS: NBM, tan top
    1998-SS, 2010 Jetta TDI

    if they're the same viscosity, in theory they should yield the same pressure.

    now, do you happen to remember the conditions under which you changed your oil the past 2 times. you may have had more oil left in your engine this last time, yielding higher oil pressure

  5. #5
    Junior Member
    Join Date
    Sep 2009
    Location
    Dayton, Ohio
    Posts
    7

    Black
    1998 Trans Am Ram Air

    oil

    It is my understanding that, as long as the oil volume is above a certain level, the pressure is unaffected. What I mean is that, as long as the pump is getting oil, and there's enough to get to the end of the channels, the pressure is the same, even if there's an additional quart or two of oil. Having said that, my car (knock on wood) does not leak or use any oil at this point, nor has it in the past. My impressions of the pressure change is based on my year-round experience with Mobil 1.

  6. #6
    I don't sell out! blackSS01's Avatar
    Join Date
    Jul 2005
    Location
    Wisconsin
    Posts
    5,558

    Black
    2001 Camaro SS M6

    I'm pushing 75 psi at idle warm. No leaks yet
    ┌∩┐(◕_◕)┌∩┐

    Man: The Mods you are fighting,
    they are the biggest Men I have ever seen. I
    wouldn't want to fight them!

    Me: That is why no one will remember your name!

  7. #7

    Post Edge is thinner

    Quote Originally Posted by bertwhitaker View Post
    So I changed the oil in the 1998 Trans Am to Castrol Edge recently (from Mobil 1, full synthetic). The oils are both 5W-30, but, with Edge, it seems the oil pressure is running higher than it did with Mobil 1 by about 10 PSI. On startup, M1 had maybe 45-50PSI, but Edge gives perhaps 55PSI. After things warm up, at idel, Mobil 1 gave maybe 30-35PSI, but Edge gives 40-43PSI. At perhaps 4500-5000rpm, Mobil 1 I think gave 45-48PSI, whereas Edge is giving 60-62PSI.



    Why would this be occurring if the two oils are of the same weight (5W-30)? What’s going on altogether? I am totally freaked out about maintaining excessive oil pressures, as I think that makes it more likely that my rear main seal (or similar seals) may fail. Am I correct to worry about the high oil pressures causing the rear main and other seals to fail prematurely?
    There is a range for 30-grade motor oils to meet SAE specs. For example, in order for a 30-grade to be labeled as a 30-grade, it has to have a viscosity somewhere between 9.30-and-12.49 @ 212 (F).

    If you look at the Product Data Sheets of both Mobil 1 5W-30 and Castrol Edge 5W-30, the following it listed:

    Mobil 1 5W-30 11.3 @ 212 (F)

    Castrol Edge 5W-30 9.8 @ 212 (F)

    So going be the Product Data Sheets, the Castrol Edge is thinner by a little when compared to Mobil 1.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Another German Castrol Question
    By wicknewman in forum General Help
    Replies: 8
    Last Post: 05-04-2009, 09:47 AM
  2. Why TF is the castrol edge commercial so funny?
    By OreoLt1 in forum Almost Anything Goes
    Replies: 5
    Last Post: 04-11-2009, 09:57 PM
  3. Lab work is back on Castrol Edge
    By Sarge in forum Almost Anything Goes
    Replies: 36
    Last Post: 02-23-2009, 01:25 PM
  4. Castrol Edge
    By Sarge in forum Almost Anything Goes
    Replies: 32
    Last Post: 02-03-2009, 09:03 AM
  5. Did SS come with a Castrol Synthetic option?
    By wildbanshee in forum Camaro / SS
    Replies: 10
    Last Post: 05-14-2008, 06:30 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •