yh i think it cools the gearbox oil, only the creators know why they think a Diesel starlet with 54 hp needs its transmission oil cooled lol. The NP90 is very slow, i suspect a problem but it drives so we don't care. but i got a 0-60 of 30.9 seconds in the NP90 The NP80 is very nippy on the other hand, and its average for its kind with 0-60 of around 14 secs. which is normal but also weighs less then the NP90. Power to Weight of the two. NP80 62.07 HP NP90 56.25 HP IT might have to be a Toyota jobby then, unless Enzo can get it cheaper