Sir I got an Innova J D4D
is that a water cooled or oil cooled?
D4D engine is both water cooled and oil lubricated.
oh i see... great to know...

what is the difference between the performance?
I don't understand your question.
sir, what I meant in here is that... ex. the Innova is only water cooled; what is the difference between a 2.diesel water cooled and a 2.5 oil cooled

Just like most engines, the Innova is oil lubricated. Oil lubricates the engine, and assists in cooling the engine. The engine needs both systems.

as Page 1 of his thread shows oil is to lubricate, water is for cooling... so can the vehicle have both for it to function at its topmost....
A car needs both these systems to function properly (cooling and lube system).
great to know...

tnx a lot...

youre makin us very knowledgeable about Diesel engines on your thread...