hello, i have a 2013 audi a3 1.4tfsi and i have noticed it uses alot of oil. is this a common issue with this model of vehicle ? any help would be much appreciated 

Hello James,

Thanks for being in ouch with the forum.

Others more knowledgeable about specific engines and build years will hopefully fill in a bit more detail, but suffice it to say it is not an uncommon issue within those parameters. 
When you say you have noticed it uses a lot of oil,  has it now just started using a lot of oil during your long term ownership, or have you recently bought it?
 If the latter, did you buy it privately or through a dealer, when did you buy it, and what quantity of oil does it use in what miles?

Kind regards,

Gareth.

I brought the car 2 weeks ago from a dealership. I done the rounds when I got it and checked everything and I noticed the oil was low so I topped it up. I have done about 600 miles in 2 weeks and it has dropped 3/4 way down the dipstick. I topped it back up today and it took just over half a litre 

Thanks James,

So the car has used half a litre in 600 miles -? 

If this were mine, I would be informing the seller that the car appears to be using an excessive amount of oil, and that you are currently monitoring its consumption over the next 500 miles. I would be doing this by e-mail, and stating that you will get back to them with the consumption figure within 2 weeks. 
If it’s monitored consumption is confirmed at around 600 miles per half litre ( i.e. 1,200 miles per litre) then I would say we have seem far worse, and you may find that it isn’t significant enough to be able to reject the car. However, I wouldn’t prejudge the situation until you have carried out your check. 
I would now be looking in the owners handbook, and you should find figures for anticipated oil consumption which you can compare with your results. 
A couple of additional questions:- what grade and brand of oil are you using to top up? What mileage has the car covered, and do you have a comprehensive service history for it?

Perhaps you could come back with the answers, and let us know how you get on with your consumption test. 
Kind regards,

Gareth.