Most liked posts in thread: Super Knock code (No Cel or Pxxxx codes)

Helix is just a little far to go since Swedish
Motors is just across the Susquehanna
from me in Marietta and they have
extensive MINI experience and training.
If I were closer I’d go to Helix.

 

Thanks all.
I will think hard about this between now
and the next time it occurs.

 

Used about half Amsoil 5W30 XL (almost A3/B3 with HTHS of 3.3) and half Mobil 1 10W30 High Mileage (slightly more viscous than I want but it's the only A3/B3 rated SN+ oil I know of).
(Of course now that I've said posted this, I'll probably start getting DTCs again - I scan once or twice a week to check for this).

 

One was thinner than I wanted per hths
and the other is a bit thicker at 40C
than I wanted,so I mixed them instead of
choosing one or the other. Couldn’t find a
single SN+ oil that checked all my boxes.
I’m not inclined to believe that some
horrible interaction or reaction will
result from combining them together
In the same oil pan and engine.

 

After having DTCs (but no CELs) for superknock about once every 2-4 weeks for most of a year,
I have had not had any in the last 3 months shortly after changing to SN+ rated oil this spring.

 

SN+ oils are made with more magnesium and less calcium and other factors(reducing deposits) that lessen the formation of small oil/fuel droplets
that make their way into the combustion chamber
and promote LSPI (low speed pre-ignition) in TGDI engines.