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any "SN Plus" AND A3/B3 (or A3/B4) oils?

Stock Problems/Issues Discussions related to warranty related issues and repairs, or other problems with the OEM parts and software for MINI Clubman (R55), Cooper and Cooper S(R56), and Cabrio (R57).

any "SN Plus" AND A3/B3 (or A3/B4) oils?

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Old 02-13-2019, 12:35 PM
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any "SN Plus" AND A3/B3 (or A3/B4) oils?

I noticed there is a new oil spec, SN Plus, which is supposed to be certified for knock prevention on DI engines like ours,
and my 2009 Clubman JCW throws a silent code (no CEL) for superknocking on one cylinder or another about once a month.
I have less than 35K on the engine so I haven't done a walnut blast yet, and it's running great otherwise.
It might be nice to use a good SN+ A3/B4 oil for my MINI, but . . .
Problem is, none of the SN Plus rated oils I've come across have ACEA A3/B3 or A3/B4 specs, and I fear the A5/B5 oils may
be thin and wimpy to provide adequate protection in an S or JCW N14 engine.
Mobil 1 Advanced Fully Synthetic 5W30 has the highest 100C viscosity of SN+ oils I could find, but it's A5/B5 and no LL-01
(LL-01 less important since I'm changing oil every 5K).

Since the SN Plus spec is relatively new, is it just a matter of time before a 5W30 A3/B4 or 0W40 A3/B4 oil comes out, or
are the two specs somewhat mutually exclusive.
 

Last edited by cristo; 02-13-2019 at 07:20 PM.
  #2  
Old 02-13-2019, 07:18 PM
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Apparently, Mobil 1 High Mileage 10W30 is A3/B3 and SN Plus
and pretty close to a good viscosity for a MINI.
I think that’s the only one.
 
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