>> Why i need to change the oil filter after 300 Kms?
Boron tends to stick to metal surfaces, so the powder will replace the carbon deposits on the inside walls of the engine. These carbon particles will then get filtered in the oil filter. [Source: earlier posts in this thread]
>> if i change the oil filter I will have to do a top up also?
I don't think so, unless the mechanic does a poor job and there's significant loss of oil in the process. |