Marine FOUR stroke oil is different from chain saw and bike oils and whilst you can use. THIS oil in a bike etc you SHOULD NOT use Bike oil in an outboard. This is a 10 w 30 oil and is what you need to change the oil in your 4 stroke outboard.YOU MUST CHANGE THE OIL EVERY YEAR AT LEAST OR YOU WILL HAVE VERY SERIOUS PROBLEMS WITH THE ENGINE !
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