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Originally Posted by NIZMAINIAC
i don't agree with the bit about the oil breaking down either, if it does break down like you say , what is the point in using thinner oil, surely that would break down even further  |
it's a proven fact, the larger the gap between the numbers the more unstable the oil is, castrol RS loses it's viscosity after about 2k, there's been a massive oil analysis thread about it on SXOC
thinner oil will give better protection at startup, if you understand correctly what the viscosity ratings mean