This business about API SJ oils worries me...
http://www.ibmwr.org/otech/oilreport.html#chartb
Would you guys use an SJ oil???
http://www.ibmwr.org/otech/oilreport.html#chartb
Would you guys use an SJ oil???
SJ oils
- Thread starter carbold
- Start date
gavin
Guest
That's why BMW tell us to use SG rated oil.
Jimb
Guest
Why??
The comparison data is for motorcycle oils with wet clutches hence the high Zinc content to give the clutch some biting power, since the GS has a dry clutch and is low revving any car engine oil is fine, there is no advantage to fully synthetic oils in a 1913 design engine.
Castrol GTX Magnatec semi synth or equivalent is the most this engine needs.
The comparison data is for motorcycle oils with wet clutches hence the high Zinc content to give the clutch some biting power, since the GS has a dry clutch and is low revving any car engine oil is fine, there is no advantage to fully synthetic oils in a 1913 design engine.
Castrol GTX Magnatec semi synth or equivalent is the most this engine needs.
i thought the zinc was to stop wear.
sorry
I was actually referring to the whole article, not to that chart
http://www.ibmwr.org/otech/oilreport.html
I was tempted by a mineral 15w50 at halfords (10 quid for 6 liters) but it's an SJ so I think I'll avoid it and stick to castrol GP 10w-40 (API SG).
Peace of mind...
I was actually referring to the whole article, not to that chart
http://www.ibmwr.org/otech/oilreport.html
I was tempted by a mineral 15w50 at halfords (10 quid for 6 liters) but it's an SJ so I think I'll avoid it and stick to castrol GP 10w-40 (API SG).
Peace of mind...
In case somebody needs to know...
I asked Halfords' customer service what the % of zinc and phosphorus are in their SJ oils and they even replied!
"...we can confirm that the zinc level will be between 0.137 and 0.180% and the phosphorus between 0.120 and 0.168%."
Which are more or less the same values as a B#W oil...maybe a bit to high for the cat.
I asked Halfords' customer service what the % of zinc and phosphorus are in their SJ oils and they even replied!
"...we can confirm that the zinc level will be between 0.137 and 0.180% and the phosphorus between 0.120 and 0.168%."
Which are more or less the same values as a B#W oil...maybe a bit to high for the cat.
Jimb
Guest
Wet clutch
castrol GP and any other bike oil is for wet clutch bikes, you don't need it, yours is a dry clutch like a car hence the lack of additives like zinc.
castrol GP and any other bike oil is for wet clutch bikes, you don't need it, yours is a dry clutch like a car hence the lack of additives like zinc.
agree
Yep, but still I wanted to use what B*w recommends and found it difficult to find an SG SH or SF oil... Looking at some threads I got the impression that Castrol GP is one of the most used in the first 15,000 miles, and it's cheap!
Yep, but still I wanted to use what B*w recommends and found it difficult to find an SG SH or SF oil... Looking at some threads I got the impression that Castrol GP is one of the most used in the first 15,000 miles, and it's cheap!
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