In this paper the subject was on oils for tractors, posibility of safe disposal of waste oils and management of waste oils in Republic of Croatia. In tractors, oils are used for lubricating certain part sets such as engine, transmission, diferentials etc. and for hydraulic work. Oil producers make oil specialized for some part sets, and universal oils used for all part sets of tractor. Recently more and more oil producers produce oils that are biologically degradable, and fast degradable. Collecting of waste oils in Republic of Croatia is in jurisdiction of Fund of environmental care and energetic efficiency and Agency of environmental care. Waste oils are collected by authorized oil collectors and disposed of by authorized companies for oil recovery using thermic or material oil recovery method. In Republic of Croatia about 35% of produced waste oils are collected and recovered, and that percentage is decreasing. A survey was conducted in order to obtain a certain image about the management of waste oils .on small and medium-sized agricultural family farms. From that survey it can be concluded that the main reasons for the poor collection of waste oils from agriculture are nonchalance and insufficient awareness of farmers on how much waste oil is harmful to the environment. Other reasons could be too few authorized collectors of waste oils or that they are poorly organized in terms of collecting oil and informing producers about disposal of waste oil.