motor blows white smoke after driving downhill

[incoming]

hey guys when ever i drive downhill (for example mt keira - syd to gong) and reach the bottom of the hill, the instant i start accelerating i get white smoke coming out the exhaust!

i've done a compression test and each readings are pretty much the same and well above 100 (cant rem exactly what they are now)

i cant figure out what it could be and what else i can try to fix this problem

the motor is b18c2
i do regular oil changes at 5000km

please help...

[wynode]

Are you loosing coolant? Does your oil colour look OK?

[incoming]

yeah its still green colour...
bit OT but i was thinking about changing coolant for summer.. but its still green.. should i change it or not?

[wynode]

When was it last changed? As long as its a nice bright green you should be OK (But doesn't cost too much to change).

But your car does blow some gray/black smoke when you drive it hard i've noticed. It's not this smoke? You're sure its white?

What I meant before was is your oil still nice and brown and have you lost any coolant?

[weezer]

Maybe try connecting a catch can across the PCV?

[incoming]

yeah my car blows HEAPS of smoke under hard driving
the colour is similar.. hard to see thru my PURPLE FADED tint ahaha

oil is still good.. lose at bit from time to time....
coolant level is still good (pretty much same as when i picked up the car)

oil catch can hey?...