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Topic-icon Oil for 1981 R100RS

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2 years 1 month ago #1900 by 11812
Oil for 1981 R100RS was created by 11812
My '81 has been sitting for awhile with new oil, but I'm getting it ready to ride, so I need to change oils and the filter.

I'm sure additives, that would have been beneficial to our engines, have been taken out of most 20w50 oil due to environmental regulations. Can I use diesel 15w40 oil? Or is there a good oil that is safe for 36 year old engines. How about Spectro 4 mineral based oils sold on Capital Cycle?

I need recommendations. Does BMW 20w50 still have all the additives needed for an '81?

Thanks

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2 years 1 month ago #1903 by 8053
Replied by 8053 on topic Oil for 1981 R100RS
You are looking for motor oil with an API service rating of SG. Lately, I have been using Spectro Heavy Duty 20W50 non-synthetic.

James Strickland, IL. Airmarshal

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2 years 1 month ago - 2 years 1 month ago #1904 by 11812
Replied by 11812 on topic Oil for 1981 R100RS

8053 wrote: You are looking for motor oil with an API service rating of SG. Lately, I have been using Spectro Heavy Duty 20W50 non-synthetic.


Thanks. Is that the Spector 4 20w50 mineral based oil on Capital Cycles? I can't read the specs on it. If not, where are you getting it? Thanks again

Here's a link:

http://www.capitalcycle.com/SPECTRO-4-20w50-Mineral-Based-Engine-Oil_p_251.html
Last edit: 2 years 1 month ago by 11812.

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2 years 1 month ago - 2 years 1 month ago #1905 by 8053
Replied by 8053 on topic Oil for 1981 R100RS
You could call Capitol Cycle and ask 'em. My local independent shop will order a box of Spectro H/D for me when I need some. Here's another tip, Mobil1 20W50 V-Twin oil has, or used to have the API SG rating as well. You might find that at Auto-zone or one of the others. I clicked on the link to Capitol Cycle and on the image of the back label, using their magnifying glass effect, I could see the API rating as SL. I think that would be more appropriate for more modern bikes with catalytic converters.

James Strickland, IL. Airmarshal
Last edit: 2 years 1 month ago by 8053.
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2 years 1 month ago - 2 years 1 month ago #1907 by 11812
Replied by 11812 on topic Oil for 1981 R100RS

8053 wrote: You could call Capitol Cycle and ask 'em. My local independent shop will order a box of Spectro H/D for me when I need some. Here's another tip, Mobil1 20W50 V-Twin oil has, or used to have the API SG rating as well. You might find that at Auto-zone or one of the others. I clicked on the link to Capitol Cycle and on the image of the back label, using their magnifying glass effect, I could see the API rating as SL. I think that would be more appropriate for more modern bikes with catalytic converters.


Your eyes are obviously better than mine on seeing the API rating.

I thought Mobile 1 was synthetic only.

I guess it would be too much to ask if BMW still marketed SG rated oil. I actually have a couple of qt bottles of BMW 20w50 SG/SH oil left. May not be enough, however. Thanks

Appendum: BMW doesn't carry the SG grade oil, but Spectro does makes SG rated 20w50 for Harleys. Guess I'll go to the Harley dealer. Thanks for the tip.
Last edit: 2 years 1 month ago by 11812.

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2 years 1 month ago #1911 by 8053
Replied by 8053 on topic Oil for 1981 R100RS
Mobil1 is synthetic oil, but Mobil1 V-Twin 20W50 carried the API SG rating the last time I checked. The Harley-Davidson Spectro 20W50 might be the Spectro Heavy Duty 20W50 that I have been using for the last 3 years. Heavy-Duty... Harley Davidson...? one still arrives at H-D.

James Strickland, IL. Airmarshal

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