Any info/already done on rsmegane?
I've asked the same question over there last week and have had zero replies, the forum is quite dead and slow.
There's a few people on there that have fitted catch tanks inline on the oil breather to intake hose so that seems like a fairly standard path, provided you can find somewhere to mount the tank.
I've not seen anyone fit one inline on the smaller breather pipe that goes into the intake manifold. I'd imagine that there would be a benefit from having one there too to further lower the amount of oil vapour going back through the engine.
The main thing I'm unsure of is if it's OK to vent both the breather hoses to atmosphere, via catch tanks. This way no blow by gases will be going back through the engine resulting in cleaner combustion and less emissions exiting the exhaust which could be beneficial come MOT time. I'm aware that some engine are fine to vent to atmosphere, however others require a vacuum to draw the gasses out so don't want to end up causing more harm than good .