Author Topic: 41 60 special oil  (Read 1150 times)

Offline mr41cadillac

  • Posts: 760
  • Name: j mclaughlin
41 60 special oil
« on: January 23, 2014, 03:47:57 PM »
the factory manual calls for 20 w oil. most oil here is 5-20w. is that proper or what is right for 41 346 engine thanks john

Offline mr41cadillac

  • Posts: 760
  • Name: j mclaughlin
Re: 41 60 special oil
« Reply #1 on: January 24, 2014, 07:05:08 AM »
what is the right oil to use in a 41 60 special 346 rebuilt engine? the original manual calls for 20 weight. the only oil I can find is Valvoline 20 w. or is there another /? thanks john

Offline 47bigcadillac

  • Posts: 169
  • CLC #25329
Re: 41 60 special oil
« Reply #2 on: January 24, 2014, 07:46:07 AM »
10w-40 with 2 bottles of zddp plus is what I have been using in my 346 for years and the engine runs great
R. Brandys

1932 355B  5 pass Coupe,  Fleetwood          
1935 LaSalle Coupe  5077
1947 Club Coupe      6207

Offline 47bigcadillac

  • Posts: 169
  • CLC #25329
Re: 41 60 special oil
« Reply #3 on: January 24, 2014, 07:56:17 AM »
http://stores.ebay.com/ABC-Direct-Auto-Parts/ZDDPlus-ZDDP-Oil-Additive-/_i.html?_fsub=291268016


The Current SN oils are very good overall but lack the amount of zddp required
« Last Edit: January 24, 2014, 07:58:50 AM by 47bigcadillac »
R. Brandys

1932 355B  5 pass Coupe,  Fleetwood          
1935 LaSalle Coupe  5077
1947 Club Coupe      6207

Offline dadscad

  • Posts: 618
  • Name: David Thomas CLC #14765
Re: 41 60 special oil
« Reply #4 on: January 24, 2014, 10:19:51 AM »
If the manual calls for a 20W oil, you can use 0-20 or 5-20 oil. The lower number indicates the flowability at cold temperature start ups. The 20 is the equal to viscosity at operating temperature. What you want is an oil with 20 weight viscosity at operating temperature.

Keep in mind, newer oils don't have the zinc and phosphorus the older oil generations had. Although, today's oils with the lower levels of Zinc and phosphorus are probably far superior than what was available in 41, in regards to wear protection and film strength.

HTH, David
Enjoy The Ride,
David Thomas CLC #14765
1963 Coupe deVille

Offline harry s

  • Harry Scott 4195
  • Posts: 1924
Re: 41 60 special oil
« Reply #5 on: January 24, 2014, 10:20:31 AM »
John, Since your engine is newly rebuilt and has not been started I would use the 5/20 with the ZDDP additive as previously suggested. I would also plan on changing that initial oil fill after several hundred miles or equivilant hours and at that point go to 10/30 with ZDDP for warm weather. The ZDDP is very important for these engines without it they can wipe in a short period of time. Good Luck,    Harry
Harry Scott 4195
1941 6733
1948 6267X
2011 DTS Platinum

Offline turk

  • Posts: 38
  • Name: C Dunn #21290
Re: 41 60 special oil
« Reply #6 on: January 24, 2014, 10:28:04 AM »
I am not as old as your 41,,  but close!  It used to be in vehicles of those years to " break-in"  engines for a few hundred miles or so on a light weight oil, say 10W . This was also accompanied with the instruction not to run at high speeds, nor for sustained periods of time.  This meant to fluctuate driving speeds every so often by 10mph or more !   The oil was changed at about 300 miles as was a filter replacement which would have picked up all the grinding particles etc embedded in the block during the rebuild process. Start by adding a ZDDP additive, then oil then a multi viscosity or 10 wt detergent oil.
       After the "break-in" procedure, I would first, use a ZDDP additive to protect your cam and lifters, and then a good quality motor oil like a 10w-40 detergent grade oil.  This viscosity might differ depending on the climate in which you reside.
Hope this helps.
C Dunn
CLC 21290
« Last Edit: January 24, 2014, 11:28:35 AM by turk »
Carlos Dunn  #21290

Offline Barry M Wheeler #2189

  • Administrator
  • Posts: 3492
  • CLC Number: 2189
  • Name: Barry Wheeler
Re: 41 60 special oil
« Reply #7 on: January 24, 2014, 11:14:07 AM »
John, the Indiana Region of the CCCA has available the proper oil for classic cars. They also have a site describing it.
Barry M. Wheeler #2189


1981 Cadillac Seville
1991 Cadillac Seville

joeceretti

  • Guest
Re: 41 60 special oil
« Reply #8 on: January 24, 2014, 01:09:10 PM »
I use kendall GT-1 exclusively. It has the correct additives in it already. They call it "Liquid Titanium". It's not much more than regular oil.

Offline Bill Podany #19567

  • Posts: 269
Re: 41 60 special oil
« Reply #9 on: January 29, 2014, 07:25:41 PM »
I suggest you follow Barry Wheeler's advice and order the proper oil from the CCCA of Indinia.  The phone number: 317-225-0040.

Bill Podany
Knoxville, TN
1941 60 Special
1941 60 Special Fleetwood
1955 Eldorado

 

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