Wheels look awesome Vijay. I found the M sport badges didnt stick too well on the new wheels I bought, so used a strong adhesive and havent moved yet.
Last night I managed to get the car in the air, albeit not tall enough to get to the gearbox and drain the oil, but managed to pump out the diff and refresh with Valvoline oil. The oil came out pretty clean looking , albeit probably tired and original. I refilled with more than one litre , probably nearer 1.2 litres before the oil started to weep from the diff fill hole. The car was on level ground. If you go on ebay and buy some ketchup pumps , they have the same threaded nut to fit oil containers. I cut the hose down so they fit in the 1 litre containers and then use a small length of plastic see through hose and a small piece of copper pipe on the nozzle , hooked in the end, is a cheap and efficient way to fill gearbox's and diffs. Less than a fiver each. To pump the diff out, I just fitted the hose in the end of the pump that is in the container and then just pumped it into a drain tray. Took longer to fish the oil plug in and out than to empty and fill the diff.
Gearbox is next Saturday, as need the pit to do it and a portion of my body wouldnt fit under the car.

Must stay off beer and kebabs
Also, bought a new pollen filter. Undid and removed the old one and it was autumn in the car, as the floors were awash with brown crinkly leaves. Like loads of them. Checked the filter and all was fine, so an airline later and a hoover out the car, I refitted the old one and left the new one as stock.
Went to meet another Z4 owner this morning to collect some Eibach springs too.