Yes the axle stands should be a consideration Alex.  I have a couple and a trolley jack already.  Did you put the Porche on four or just the front?  As for the AA Dean I used to use them many years ago but got out of the habit.  Not sure what they would charge for an oil change now but whatever it'll be cheaper to do it myself unless they discount oil and filters etc. I'll give them a call.  I'm still thinking it would be neat and relatively simple to poke a tube down the hole, suck out the oil, pour in the mobil one, spin off the filter and replace and go for a ride eh? 😆