Ay, additional:
Every 5000 km, your diesel costs will be around 16,000 pesos (given urban traffic), at about 10 km/l.
Every 5000 km, your gasoline costs will be around 23,000 pesos (given urban traffic), at about 8 km/l.
A 5000km checkup for a 2.5 liter diesel vehicle will cost you around 4500 (dunno if the Innova is the same), while the 5000km checkup for a 2.0 gas vehicle costs around 2500.
Total cost per 5000 km is around 20,500 for diesel, and 25,500 for gas. You save about 5,000 pesos for every 5,000 km, or about 1 peso per kilometer with the diesel version. That's merely a rough estimate, mind you.
I don't know how much the price difference between gas and diesel variants is, but that also factors into your decision making.
Hey, for anybody who knows, is the Innova VVTi still on the 5,000 km sched or at 10,000km? If it is at 10k km, then the savings drop to about 3,750 pesos per 5,000 km.
Which means you'll have to drive at least 30-40k km a year to make back the cost difference between getting the gas and the diesel.
Pero with the possible pump problems you'll get with the diesel once you're past warranty, and the fact that it's a turbo (I think), will mean relatively more maintenance costs after three years than the gas variant, which will have steady maintenance costs over five to seven years.