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Shock oil weight?

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Old March 3rd, 2023, 07:51 AM
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Shock oil weight?

I cant find specifics but does anyone happen to know what weight oil to use in a 31 Olds shock? I figure its light like sewing machine oil. Thanks
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Old March 3rd, 2023, 09:24 AM
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I think there has been a thread on this before. You might try the search function.

Try this link:

Shock Absorber Oil - ClassicOldsmobile.com
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Old March 3rd, 2023, 09:26 AM
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I've read discussions over at the https://forums.aaca.org/ about shock oils. I have no personal experience with them. They often mention hydraulic jack oil and motorcycle fork oil as modern replacements. Might search over there and get options, opinions.
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Old March 5th, 2023, 07:04 AM
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Originally Posted by don71
I've read discussions over at the https://forums.aaca.org/ about shock oils. I have no personal experience with them. They often mention hydraulic jack oil and motorcycle fork oil as modern replacements. Might search over there and get options, opinions.
Jack/fork oil would seem like a practical replacement in my opinion.😊
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Old March 5th, 2023, 08:08 AM
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With the motorcycle shock oil you will have a wider selection of viscosity over the jack oil.
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Old March 5th, 2023, 10:03 AM
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I'd venture a quick call to Apple Hydraulics since they rebuild vintage shocks & most likely have excellent familiarity with your style of shocks. Shock oil must have the correct anti-foaming agent(s) to operate efficiently. As I stated in the referenced link (above):
Motorcycle fork oil (cruisers/baggers/bobbers) standard weight is generally 5. Happy medium is a 7. Most often no one goes above a 10. AMSOIL sells both #5 & #10 motorcycle fork oils. H-D refers to their fork oil as “E” (just as a general statement) which I think is ~7. Can’t recall exactly. I ride an Indian and use AMSOIL #5.
I don't want to imply that is the correct oil for your shock(s), but a quick call would help to confirm (they rebuild Oldsmobile shocks, as well): 631-369-9616
They sell a quart of shock hydraulic oil for $19.95







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