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#29
25-02-2006, 13:20
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engine flush is bad, it disturbs carbon that would normally just stay put and gets it moving round your engine
Silkolene 10w50 has been proved not to have degraded at all after 7k on an s14a, and that's after 2 track days. Castrol is designed for VERY high temperature applications but as such is a compromised formulation and doesn't hold it's viscosity. for the road you want a stable oil. castrol RS also has a very high sulphur content which some engines don't like 
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