Have Toyota Questions? Ask a Mechanic for Answers ASAP
Do you mean 1978?
You have only made a deposit to your just answer account. You need to understand that people make typo mistakes and is extremely unusual to see something that old and a question for that. To answer your question specifically provided the car is in good condition and the engine is in good condition and you're getting no engine predetination or knocking/pinging on hard acceleration the 87 octane will not hurt the engine. If the EGR valve was not functioning properly and you had 87 octane you might get some slight pinging or predetination.