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M1 5W/50 | 5,012 | 74 MGB #4482521
08/08/17 08:27 AM
08/08/17 08:27 AM
Joined: Aug 2016
Posts: 2
NC
Topherism Offline OP
Topherism  Offline OP
Joined: Aug 2016
Posts: 2
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	

Last edited by Topherism; 08/08/17 08:32 AM.

1974 MGB
Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism] #4482527
08/08/17 08:34 AM
08/08/17 08:34 AM
Joined: Oct 2015
Posts: 2,805
Balearic Islands , Spain
FordCapriDriver Offline
FordCapriDriver  Offline
Joined: Oct 2015
Posts: 2,805
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 w/ 20% Rimula R4X 15W-40 HDEO.

1988 Ford Escort Mk4 Xr3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.

Finnish expat in Spain.
Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism] #4482549
08/08/17 08:59 AM
08/08/17 08:59 AM
Joined: Jan 2006
Posts: 439
GA
drtyler Offline
drtyler  Offline
Joined: Jan 2006
Posts: 439
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?

Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism] #4482620
08/08/17 10:22 AM
08/08/17 10:22 AM
Joined: Jun 2002
Posts: 1,942
Texas
Bud Offline
Bud  Offline
Joined: Jun 2002
Posts: 1,942
Texas
Still running good old 20w50 in my 71 B.


2016 Honda Pilot EX-L with NAVI.....Mobil 1 0w20 AFE and Honda OEM Filter
Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism] #4482642
08/08/17 10:44 AM
08/08/17 10:44 AM
Joined: Dec 2016
Posts: 7,171
Waco, TX
Linctex Offline
Linctex  Offline
Joined: Dec 2016
Posts: 7,171
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."
Re: M1 5W/50 | 5,012 | 74 MGB [Re: Topherism] #4483225
08/08/17 11:00 PM
08/08/17 11:00 PM
Joined: Sep 2015
Posts: 2,477
Malaysia
zeng Offline
zeng  Offline
Joined: Sep 2015
Posts: 2,477
Malaysia
20W50 with chunks of Moly additives would help extending life, I suppose.


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