do the oil about every 10k.... fluids and such get change a bit due too the swimming it does..have figured it out that if one seal goes say on one a axle you may as well do both sides....i'm just glad parts don't cost much...... as for the work ute, company pays for it all so every 10k she gets everything done on the old girl..shes a diesel so ya gotta keep the services up.....wifes car,,,its a yota i dont care