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BREAK IN OIL
#2755398
03/24/20 11:32 AM
03/24/20 11:32 AM
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Joined: Feb 2006
Posts: 604
TN
1DGEMAN
OP
mopar
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OP
mopar
Joined: Feb 2006
Posts: 604
TN
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Anyone use the Summit 30wt break in oil?
Real Men shift for themselves
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Re: BREAK IN OIL
[Re: 1DGEMAN]
#2755438
03/24/20 12:58 PM
03/24/20 12:58 PM
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Joined: Oct 2007
Posts: 4,205
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,205
New York
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Can't answer directly, but a joke:
A single number, or the 1st number before the 'W', is the time in seconds for oil pressure to reach the last bearing in the engine.
5W30: 5 seconds
20W50: 20 seconds
50: 50 seconds
Boffin Emeritus
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Re: BREAK IN OIL
[Re: polyspheric]
#2755445
03/24/20 01:13 PM
03/24/20 01:13 PM
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Joined: Nov 2007
Posts: 21,814
Kirkland, Washington
Pacnorthcuda
Too Many Posts
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Too Many Posts
Joined: Nov 2007
Posts: 21,814
Kirkland, Washington
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Can't answer directly, but a joke:
A single number, or the 1st number before the 'W', is the time in seconds for oil pressure to reach the last bearing in the engine.
5W30: 5 seconds
20W50: 20 seconds
50: 50 seconds That’s funny. Interesting way of looking at it! I once did a comparison of several oils by putting them in identical jars then freezer overnight. Pretty damn interesting the next day.....30w (which was damn common in the 70’s) is REALLY thick when cold!!!
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Re: BREAK IN OIL
[Re: Pacnorthcuda]
#2755484
03/24/20 03:11 PM
03/24/20 03:11 PM
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Joined: Aug 2003
Posts: 43,099
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,099
Bend,OR USA
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I remember hearing some sort of expert comment about oil weight ratings being based on the pour rate time for a quart of oil to go through a screen or siv at the same temps., lighter weight oil went through it quicker than the heavier weight rated oils did  I can see the differences in 5W20 Wt. compared to 30Wt on the time it talks my mechanical oil pressure gauge to make pressure with the same outside air temps. Lighter weight rated oil is faster on making oil pressure to the gauge cold 
Last edited by Cab_Burge; 03/24/20 03:12 PM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: BREAK IN OIL
[Re: Cab_Burge]
#2755494
03/24/20 03:49 PM
03/24/20 03:49 PM
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Joined: Oct 2007
Posts: 4,205
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,205
New York
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oil weight ratings being based on the pour rate time
Exactly.
Boffin Emeritus
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Re: BREAK IN OIL
[Re: polyspheric]
#2755543
03/24/20 06:00 PM
03/24/20 06:00 PM
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Joined: Feb 2006
Posts: 604
TN
1DGEMAN
OP
mopar
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OP
mopar
Joined: Feb 2006
Posts: 604
TN
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Valid points on oil viscosity. i bought some 10w30 break in oil.
Real Men shift for themselves
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Re: BREAK IN OIL
[Re: 1DGEMAN]
#2755561
03/24/20 07:28 PM
03/24/20 07:28 PM
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Joined: Jan 2003
Posts: 3,122
Auburn WA
Dave_J
master
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master
Joined: Jan 2003
Posts: 3,122
Auburn WA
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The question is, Roller or Slider? My 410 stroker Magmumn 5.9 roller cam will get a 15W40 (Delo LE or Rotella T5) for the first and second oil change. Then 5W30 Syn blend.
Retired, US ARMY 1973-1994
ASE mechanic, Electrical 1994-1997
Retired GTE/VERIZON/FRONTIER 1997-2015
Posting cheap tech help (CRAP) here since Nov 97, 1000's of posts, some may be good.
03 Suzuki Burgman 650(Burger King) Scooter
65 Formula S Cuda
78 Little Red Express Truck
98 Buick Regal (wifes car)
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