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Author Topic: Motor Oil Source  (Read 887 times)

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Offline Rosinante

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Motor Oil Source
« on: June 05, 2021, 02:15:37 PM »
Where do you guys get your motor oil for these machines?  I live in Olympia WA.
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1978 CB750K

Offline goodtryer

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Re: Motor Oil Source
« Reply #1 on: June 05, 2021, 02:35:07 PM »
Walmart or Amazon. The auto parts places have really gone up in price & I don't need to the oil filters they include in the price.
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"Tolerance will reach such a level that intelligent people will be banned from thinking so as not to offend the imbeciles."
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1977 CB550K
1978 CB750K
1973 CB500K

Offline dave500

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Re: Motor Oil Source
« Reply #2 on: June 05, 2021, 11:18:48 PM »
use any quality diesel motor oil 15/40.
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Offline Rosinante

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Re: Motor Oil Source
« Reply #3 on: June 06, 2021, 01:57:00 PM »
Quote from: dave500 on June 05, 2021, 11:18:48 PM
use any quality diesel motor oil 15/40.

Dino-oil, right?  I think at least some of the synthetic stuff does not play well with our clutch packs.  And my guess is that we should be using oil with plenty of ZDDP.  Is that correct?  I have two 1978 air-cooled vehicles with mechanical lifters that ride against the cam, one of them is the CB750.  The other one needs ZDDP for those lifter surfaces.
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1978 CB750K

Offline Alan F.

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Re: Motor Oil Source
« Reply #4 on: June 06, 2021, 02:27:46 PM »
There is quite a good discussion of oils that meet the oem specs from the 70s in the last few pages of Hondaman's rebuild thread:
http://forums.sohc4.net/index.php/topic,122379.0.html
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Offline MauiK3

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Re: Motor Oil Source
« Reply #5 on: June 06, 2021, 03:00:42 PM »
I go to Napa Auto and get motorcycle oil, 4 stroke.
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