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1953 Corvette engine oil specifications. #5123295 06/02/19 06:01 PM
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79sunrunner Offline OP
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Oddly 20 weight is specified for summer temperatures. I remembered my friends '54 Chevy Special also recommended 20 weight for summer. I wonder if this is still the correct viscosity of oil for these engines today? At least in good condition engines such as 5w20. Also note British manufactures such as Jaguar and MG suggested 30 and 40 weight for +32F and +80F weather.



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Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123303 06/02/19 06:08 PM
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My uncle worked for Gulf oil way back then. He said to Run sae20 until consumption went up,then sae30 then once to sae40 a rebuild was due


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123306 06/02/19 06:12 PM
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Garak Offline
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The HTHS of a monograde 20 might be a bit higher than the 5w-20 and 0w-20 ILSAC options we see today.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123307 06/02/19 06:12 PM
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faltic Offline
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Interesting


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Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123312 06/02/19 06:15 PM
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bubbatime Offline
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I would not run 5W20 in it.

Id run 15W40 heavy duty engine oil in it. You wont find any roller camshaft or roller rockers in that thing... all flat tappet stuff.


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Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123320 06/02/19 06:23 PM
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Blue Flame 6 cylinder and 2 speed auto.


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Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123327 06/02/19 06:28 PM
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wwillson Offline
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John Deere tractor manuals from the 1960s had similar viscosity recommendations.

Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123329 06/02/19 06:29 PM
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bullwinkle Offline
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5W20 would be a bit thinner & more shear prone than SAE 20-but it would work a lot better in cold weather. I would (like said above) 15W40 or straight SAE 30 HDEO in it-zero emissions equipment, not even a PCV valve, and a little lead substitute in the fuel wouldn't hurt anything either, due to the non-hardened valve seats.


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Re: 1953 Corvette engine oil specifications. [Re: Garak] #5123330 06/02/19 06:30 PM
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OilUzer Offline
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Originally Posted by Garak
The HTHS of a monograde 20 might be a bit higher than the 5w-20 and 0w-20 ILSAC options we see today.


Good point.
Monogrades don't have any vii either. Isn't that true?

Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123337 06/02/19 06:39 PM
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tig1 Offline
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I used Valvo 20wt in the late 60's and early 70's.


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Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123339 06/02/19 06:42 PM
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rfeir Offline
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Oil today is nothing like the oil offered back in 53. I have a 59 and run 0W-40 European Formula Mobil 1.
The Car is used infrequently and runs great on this modern oil. No sludge, no varnish and it starts quickly.
I take it to the redline with no effort.


RPF
Re: 1953 Corvette engine oil specifications. [Re: OilUzer] #5123356 06/02/19 07:01 PM
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Garak Offline
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Originally Posted by OilUzer
Monogrades don't have any vii either. Isn't that true?

Yes. SAE 20 and 20w-20 were common recommendations at one time.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 1953 Corvette engine oil specifications. [Re: OilUzer] #5123381 06/02/19 07:24 PM
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Nickdfresh Offline
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Originally Posted by OilUzer
Originally Posted by Garak
The HTHS of a monograde 20 might be a bit higher than the 5w-20 and 0w-20 ILSAC options we see today.


Good point.
Monogrades don't have any vii either. Isn't that true?


They were 1950's Group I oils with almost no additive pack. Do you think they're anywhere near the full syn 20W's of today?

Re: 1953 Corvette engine oil specifications. [Re: Nickdfresh] #5123395 06/02/19 07:38 PM
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Garak Offline
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The additive pack today will be much better, but the viscosity won't be there. I would suggest one jump a grade, or track down a modern SAE 20 or 20w-20, if such can be found. Castrol had the last 20w-20 I saw, just a few years ago.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: 1953 Corvette engine oil specifications. [Re: 79sunrunner] #5123399 06/02/19 07:39 PM
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Carbon12 Offline
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I remember reading somewhere that SAE 20 has an HTHS near 3.0-3.1 cP which is similar to modern ILSAC 5w30 or 10w30.

Old tractors have similar viscosity/temperature charts. I have 52 Farmall Super C and I use Rotella 10w30. HTHS of 3.5 (near most SAE 30's) yet would be much better in cold weather. Higher ZDDP too.

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