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Old 12-05-2011, 12:37 AM   #1
Buffel OP
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Wink airhead oil

I use this oil in my airhead http://www.commaoil.com/productsguide/view/6/173 which uses 0.18% zinc and 0.18% phosphor. Is this a good oil? Or should i change it for something with API class sg instead of sl?
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Old 12-05-2011, 01:18 AM   #2
wmax351
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Just saying:

I'd stick with something normal. Mobil 1 15w-50, or Castrol 20w-50. Either should be fine, once breakin is done.

Diesel rated oil is good for breakin, and is cheap.
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Old 12-05-2011, 02:02 AM   #3
Arkwright
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In an Airhead you should use a mineral 20/50, fancy modern oils are too thin, in the gearbox and bevel drive you must use 80/90 GL5 spec gear oil, GL4 is not good enough for the shear strains in a BMW box. Every time you change the engine oil change the transmission oils as well (for what it costs, they're quite reasonable when bought in bulk).
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Old 12-05-2011, 04:26 AM   #4
dartman340ta
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well i have 2 ? for you all 1978 r100/7 oil light flickers at idle... any reason for this ... oil is full? idle is 1000 ...
#2 is they a easy way to sink the two carbs on this machine... just did a top end fix and carb rebuild's ...is there a vac port on them ... cant seam to find any on the carbs or in the book
i
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Old 12-05-2011, 04:36 AM   #5
Buffel OP
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Quote:
Originally Posted by dartman340ta View Post
well i have 2 ? for you all 1978 r100/7 oil light flickers at idle... any reason for this ... oil is full? idle is 1000 ...
#2 is they a easy way to sink the two carbs on this machine... just did a top end fix and carb rebuild's ...is there a vac port on them ... cant seam to find any on the carbs or in the book
i
Maybe its a bad oil pressure switch (located under the left cilinder)
And there should be vacum ports on the carbs. But you can also sinc then by ear using the sparkplug shorting method.

But i should change my oil again i guess?
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Old 12-05-2011, 05:16 AM   #6
100RT
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Quote:
Originally Posted by wmax351 View Post
Just saying:

I'd stick with something normal. Mobil 1 15w-50, or Castrol 20w-50. Either should be fine, once breakin is done.

Diesel rated oil is good for breakin, and is cheap.
A few years back there was an article in the BMWMOA that showed what happened to the lifters in an airhead after using Castrol GTX and it wasnt pretty. Valvoline racing 20-50 is high in the zinc and phos and is reasonable in price, Valvoline also makes a motorcycle oil that meets the SG specs.
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Old 12-05-2011, 07:01 AM   #7
Buffel OP
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But how high should these values be??
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Old 12-05-2011, 07:06 AM   #8
TimTowtdi
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Check out bobistheoilguy.com for lots of info on oils. You will get more reasonable replies there then here.
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Old 12-05-2011, 01:41 PM   #9
wmax351
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Just bought some Redline ZZDP/breakin additive. Seems like that is the easy way to go. Usually don't trust additives, But I'll make an exception if its from redline and doesn't promise unreasonable stuff.
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Old 12-05-2011, 02:12 PM   #10
Buffel OP
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bought the right oil now, changed it agian so problem solved:)
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