I don't know about Roofy's engine, our 3.0TD Hiace vans did 10000klm before their 1st oil change and 1st service.
Toyota would of put good oil in from the get go without a doubt or they couldn't offer the amazing warranty's on new cars.
Good oil is cheap compared to another engine swap, it's false economy to use some cheap stuff.
Do it once - do it right!