ABSTRACT The test material@ API 79-1@ use composite Motor oil@ was tested for potential acute toxicity@ using a battery of six tests: Primary Skin Irritation@ Primary Eye Irritation@ Skin sensitization@ Acute Dermal Toxicity@ Acute Oral Toxicity@ and Subacute Dermal Toxicity. Material@ methods@ and results of individual ests are presented in this report. The test material API 79-7 produced minimal skin irritation and no eye irritation. The skin sensitization test produced no sensitization. Acute dermal testing resulted in slight dermal irritation but no signs of systemic toxicity. The oral median lethal dose@ i.e.@ oral LD50 of the test material is greater than 25 ml/kg. Subacute dermal testing resulted in dermal irritation but no obvious treatment-related systemic toxicity.