I have a kawasaki ninja 250 when i chang the oil is it ok if i dont change the filter

I change my cartridge type filters every other oil change and have seen no ill effects on my Goldwings. I do loosen the filter cover to drain the small amount of oil in the filter compartment. The important thing is to have a filter in so IF the motor does break , you do not get metal into the oil pump and small passageways or cause other damage from the pieces of metal suspended in the oil. An oil filter does not cost that much . Find a deal and buy several on line. If you have several on hand it will not be a big deal whether or not you change it each time you do an oil change. Overall you would be better off just changing the filter each time you do an oil change. If you decide to skip every other time you should see no ill affects.

Hello,

No... you should always change the oil filter. The oil filter is designed to keep your oil clean of particulates that can damage your engine. Not changing it every oil change can reduce your engine life.

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Regards,

Oz