I got in on Oliveira at the start of the week at +120. I think Felder gets too much respect from bettors because of his techincal style and the start to his UFC career (he entered undefeated and got big hype off his spinning backfist KO of Castillo). I was quite impressed with his last perfomance against Steve Ray, but haven't been over the course of his UFC career. Hes too tentative and his striking defense is actually subpar (most notable was his destruction at the hands of Trinaldo). His game really needs an offensive wresting aspect to seal or steal all the close rounds he has on the feet, but he has none. I don't think Oliveira will be able to piece him up standing, he obviously lacks the ability to fight 3 consistent rounds on the feet and has lots of wholes in his D, but he will land shots on Felder.
Look at Oliveira's last opponents - Will Brooks, Lamas, Pettis, Jury, Holloway, Lentz, Jeremy Stephens (4 -3 record). He is a bit of an enigma as his performances vary quite widely amongst and even within fights, but I wouldn't be surpised to see him run through Felder. On the other hand, you're hoping for a poor performance out of Charles, or a nail biter decision and thats only if Felders TDD holds up.