I`ve always raised my car under the front subframe and rear spring perches to take the weight off of the suspension,I especially done this for a few years when I didn`t have indoor storage,due to the amount of snow we get here,got to love those Canadian winters,EH!So my advice is if you`re storing it inside don`t bother,it won`t hurt it to sit around,keep proper air pressure in the tires and it should be alright.