Congratulations. Synthetic oil is definitely the way to go. If you ask 50 people which oil to use you willet about 60 opinions! Silkolene now do a sae 50 (I think) 2 stroke oil again which is perfect for Scotts but expensive. I use whatever synthetic 2t oil I come across and its worked for 23 years👍 Set your pump to give 4 or 5 spits between a good drip from each beak. Where are you based?