Jh The Toyota yaris is an entry level toyota but toyota is a fine car. Your first oil change should be at 3000 miles or go by your owners manual for scheduled maintenance. DO NOT USE PENNZOIL IN YOUR CAR! Here is the reason you have FIPG for a lot of the metal parts holding together for example the valve covers and the oil pan and front and rear main seals. the additive in pennzoil dissolves fipg much like when you mix dishwashing detergent with grease it dissolves it like water same thing with pennzoil and fipg Nissan has no gaskets all fipg and they suffer the worst all Japanese and Korean cars do. I don't even carry Pennzoil in my shop if you want Pennzoil I have you sign a disclaimer we are nor responsible for oil leaks or damage to the engine.
I did not know that. I don't use Pennzoil, but thanks for the heads up.