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#4482521 - 08/08/17 09:27 AM M1 5W/50 | 5,012 | 74 MGB
Topherism Offline


Registered: 08/10/16
Posts: 2
Loc: NC
Code:
	
Mobil1 5W/50
1974 MGB stock, never rebuilt, using lead substitute

Miles Oil: 5,012
Miles Unit: 90,012
Make up: 5qt


         current test	fleet average
ALUMINUM	4	5
CHROMIUM	0	1
IRON     	18	33
COPPER     	36	14
LEAD     	51	24
TIN     	0	1
MOLYBDENUM	77	31
NICKEL          0	0
MANGANESE	1	1
SILVER     	0	0
TITANIUM	0	0
POTASSIUM	224	3
BORON	        56	54
SILICON     	3	11
SODIUM     	11	90
CALCIUM   	1111	2020
MAGNESIUM	722	124
PHOSPHORUS	1012	877
ZINC	        1283	1041
BARIUM     	0	0
		
		
		
		
SUS Viscosity @ 210F	78.9	
cSt Viscosity @ 100C	15.25	
Flashpoint in F	375	


Edited by Topherism (08/08/17 09:32 AM)
_________________________
1974 MGB

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#4482527 - 08/08/17 09:34 AM Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism]
FordCapriDriver Offline


Registered: 10/22/15
Posts: 2441
Loc: Balearic Islands , Spain
Looks good! these engines usually live happy lives on a diet of Mineral 20W-50, but the 5W-50 Mobil 1 seems to work great!
The lead is probably mostly from being run on leaded gas.
_________________________
1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50.
1988 Ford Escort MkIV 1.6 Xr3i Cabrio, - Comma X-Flow XS 10W-40.

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#4482549 - 08/08/17 09:59 AM Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism]
drtyler Offline


Registered: 01/04/06
Posts: 413
Loc: GA
Potassium number is concerning. It may be part of the lead substitute package.

Cool car. How long have you owned it?

Is the 5 quarts of makeup oil due to leaks or usage?

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#4482620 - 08/08/17 11:22 AM Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism]
Bud Offline


Registered: 06/04/02
Posts: 1755
Loc: Texas
Still running good old 20w50 in my 71 B.
_________________________
2016 Honda Pilot EX-L with NAV.....Mobil 1 0w20 AFE and Ultra XG7317

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#4482642 - 08/08/17 11:44 AM Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism]
Linctex Offline


Registered: 12/31/16
Posts: 6186
Loc: Waco, TX
Copper and Lead are way more than 2X the average!

I think you may need bearings really soon......
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4483225 - 08/09/17 12:00 AM Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism]
zeng Offline


Registered: 09/01/15
Posts: 2198
Loc: Malaysia
20W50 with chunks of Moly additives would help extending life, I suppose.

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