Toyota stiffing the oil service?

[lamadoo]

Hello yaris friends,

I've brought a used 2007 yaris (not diesel) 1.3lt engine at 73km (now 79k) and i am in love with her

Is it normal practice to use NON-synthetic oil (castrol gtx protection) to service the yaris every 10km? it costs about 20 dollars only...



The previous owner had got my yaris serviced at toyota under contract of every 10km and the toyota people have been using non-synthetic cheap oil (castrol gtx protection @ 20bucks) up untill it reached about 70km from brand new, in which it was then sold to me.

To my understanding, non-synthetic oil last up to 5km while full-synthetic goes a solid 10km. Is this just dodgy toyota servicing? Even the servicing book times its oil change interval at every 10km but toyota uses non-synthetic oil

I just don't see how non-synthetic oil can be used for 10km without it losing a ton of lubrication, isn't this bad practice for the yaris?

Love to hear your opinions thanks !

Picture of the cheap non-sythetic oil used at every 10km interval