Having cooked on both types, i selected a 3 burner one for my kitchen. there are 2 type of models in 3 burners; one in which all three burners are in a straight line, the other where two are placed together and a big one is placed separately. i opted...
Now days Yes assuming you are talking about DVD-R and DVD+R . Older drives may have problems.
Do not oil them. The only answer is to remove the burners,wire brush them and clean out the holes.