i want to know about pet..

i have pet lvl 5..
which is preferable?
i buy auto res collector now or wait till it lvl 8?
i know lvl 3 collecter res have far range..
but pet fuel will consume very fast as it increase its lvl..
max fuel per min for lvl 5 :41
max fuel per min for lvl 8 :57
only a little difference..
which is better??

if u use bot pet boxcollector is a musthave
wait lv 8
if u mean resorces like prometium i think its usefull only for palladium so uthe second level shoul be ok
thanks if i helped

lvl 2 res collector have good range enough to collect palla??im confused..can 1500 range cover the 5-3 palla field?

noone can cover 3-5 fileds
only 1 but faster
lv 2 is enough

but i see my pet range tooo noob...if i cloak,where the best coordinate?i try at radiation zone n my pet collect too little palla...