I purchased at Toyota Central as well, and they called me when I was around 2500km, but they said it was due because it had been three months. I told them that the manual clearly said 6 months is the recommended service interval and that shut them up.
I will take it to them in another thousand km, when I hit 5k. Normally Iâd wait till 7.5k, but it currently has the factory fill of Toyota Dezon and it will be around 6 months, so Iâll take it to them along with my Caltex Delo 400 MGX. Theyâve already said that itâs fine if I bring my own oil, as long as itâs suitable for Diesel engines.
If Toyota Central starts talking about warranty issues, tell them to get it in writing from Indus Motors why the manual is incorrect. Theyâll quickly backtrack and say itâs ok and theyâll change your oil at the correct interval.
People donât realize that changing too frequently isnât a gold thing either. Early on in the oils life, the detergents are doing their cleaning, and then later on the antiwear additives start laying down their protective layer on the high pressure areas of the engine. Changing oil too frequently can mean you miss letting the antiwear additives do their job.