What type of motor oil does a lexus sc300 take?? For a 1993?

Also do you have to do an oil change when adding more oil??

Thanks

Chevron 10w-30wt ,change every 3,000 miles.

90% of the time it will say on the oil cap and 100% of the time it will say in the owners manual.
And no if it burns or leaks oil you can just add without changing it.

Valvoline Max Life 10W40. Change every 3000 miles. Add till full. DO NOT OVER FILL