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#4675785 - 02/23/18 06:45 PM Help me choose the best oil for a 41 Ford Flathead
randytrish Offline


Registered: 04/21/08
Posts: 43
Loc: North Carolina
Hello all,
I've recently picked up a '41 ford pu with the original flathead engine. It's been in storage for 25 years and recently brought back to life. The previous owner changed the oil with a straight 30w just to get running. A friend has a simular flathead, although completely rebuilt, he runs Rotella 15/40. Engine starts and runs fine, no noise or smoke. I'm not driving it no more than a few minutes at a time to move it around. Getting some fresh oil in it first and then I'll start sorting out the rest.I do not know any of the history of the past 70 years. Thanks in advance,
Randy

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#4675796 - 02/23/18 06:53 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
PimTac Offline


Registered: 03/04/17
Posts: 4342
Loc: Soviet State of Washington
I am hoping you can post some pictures of this classic. BrocLuno is the poster with the knowledge of old engines and how to go about getting them running.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4675798 - 02/23/18 06:54 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
JohnnyJohnson Offline


Registered: 10/22/09
Posts: 2774
Loc: Wet side WA
Any oil you put in it will be better than the choices in 1941. If it's stock I'd just use 5w-30.
_________________________
2004 Toyota Corolla 121808
Out: QSUD 5W-30 Purolator One 5030
In: Valvoline ML 5w-30 TG4967 117530 2-8-18
2006 Duramax 74047
Out: T6 5W-40 M1-303
In: T6 5W-40 XG9100 73752 4-22-18

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#4675806 - 02/23/18 07:04 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
randytrish Offline


Registered: 04/21/08
Posts: 43
Loc: North Carolina

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#4675810 - 02/23/18 07:05 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
Trav Offline


Registered: 11/20/06
Posts: 18911
Loc: MA, Mittelfranken.de
_________________________
ASE L1, Master. Deutsch Meisterbrief.

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#4675852 - 02/23/18 07:51 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
PimTac Offline


Registered: 03/04/17
Posts: 4342
Loc: Soviet State of Washington
Originally Posted By: randytrish





That is a beauty and in great shape.
_________________________
2017 Mazda CX-5 Grand Touring

Valvoline Advanced Synthetic 0w20
Mobil 1 M108A EP filter


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#4675862 - 02/23/18 08:02 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
randytrish Offline


Registered: 04/21/08
Posts: 43
Loc: North Carolina
Thanks. It is in fantastic condition. Fully stock exept 12v conversion. Kind of a sad story behind it. The Dad bought it in the mid 60's, drove and enjoyed it. Decided to have it restored in the mid 90's. Got cancer and past away before it was completed. The family kept it stored since '95. I told his son I would get it back going and enjoy it.

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#4675873 - 02/23/18 08:13 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
daves66nova Offline


Registered: 04/11/04
Posts: 3652
Loc: los angeles
Add STP Engine oil treatment. It has Zinc.
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#4675881 - 02/23/18 08:20 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
SilverFusion2010 Offline


Registered: 06/29/11
Posts: 1665
Loc: Crawfordville FL
An HDEO for greater zddp. Rotella T4 would do nicely
_________________________
2010 Ford Fusion SE 3.0L V6, 178k miles M1 HM 10w-30

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#4675896 - 02/23/18 08:32 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
randytrish Offline


Registered: 04/21/08
Posts: 43
Loc: North Carolina
I've got Rotella T4 15/40. Wasn't sure about a multi weight. Wanted to get some opions here first.

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#4675902 - 02/23/18 08:42 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
Astro14 Offline


Registered: 10/10/10
Posts: 8545
Loc: Virginia Beach
Originally Posted By: randytrish
I've got Rotella T4 15/40. Wasn't sure about a multi weight. Wanted to get some opions here first.


For an engine as modern as that (metal shell bearings instead of babbit, downdraft carburetor), Rotella 15/40 would be a great choice.

Let me know if you get something that’s really old...

grin
_________________________
32 Packard 15W40
02 Volvo V70 T5 0W40 M1
02 Volvo V70 XC 0W40 Edge
05 MB S600 0W40 M1
16 Tundra 1794 5W30 Valvoline

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#4675978 - 02/23/18 10:04 PM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
Linctex Offline


Registered: 12/31/16
Posts: 6178
Loc: Waco, TX
In these very old (pre-1960) engines, I like Rotella T1 (straight 30 HDEO) or Traveler (Tractor Supply TSC) straight 30 HDEO.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4676053 - 02/24/18 12:21 AM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
das_peikko Offline


Registered: 01/01/18
Posts: 524
Loc: San Antonio, TX
15W/40 is good. Something with ZDDP. You could even go Joe Gibbs or Brad Penn if you want to get fancy.

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#4676083 - 02/24/18 03:33 AM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
Red91 Offline


Registered: 12/09/13
Posts: 2127
Loc: Alabama, United States
Plain ol HD 30. Supertech comes to mind. We used to have a customer(passed on) who was a huge flathead nut. He knew them inside and out, and collected everything from bone stock to about as built as you could build one. He even had a couple or three Ardun overhead valve conversions. He ran Valvoline 30. Not VR1, just regular conventional.
_________________________
'89 Chevy 1500
Napa 20/50
'15 Chevy Cruze
AcDelco syn dexos 5/30

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#4676090 - 02/24/18 04:33 AM Re: Help me choose the best oil for a 41 Ford Flathead [Re: randytrish]
randytrish Offline


Registered: 04/21/08
Posts: 43
Loc: North Carolina
Thanks for the responses. I understand about the need for the ZDDP. I was more curious about the need for a multi weight.

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