Esters like Propionate would still be greatly more Ideal over susp. If thats all you can get so be it, but you should be prepared to poke your self overly frequently. So rotate site inj spots frequently. If you get stock on a big gauge 23g+ I would try to heat the oil up for site inj on limbs and aim for a 25g.
Also its just my two cents but I feel a 4-6 week cycle is very pointless if your goal is to gain muscle and lose fat, other than for a temporary kick. I am more inclined towards 4-6 months, even for the serious beginner. Their is just no point to stop after 4 weeks unless you run out of $, and if at that point you cannot afford to continue you should not have even started IMO. Your natural hormonal sys should still be some what optimal within that 6 month grace period and easy to spark up again with a fairly strategic PCT.