Can oil kill sperm?

Hi.  I was just wondering if oil (not used as lube) but was probably present during sex can kill sperm?  I was giving my husband a massage because he had a backache and well, one thing lead to another.  I don't know what kind of oil but it is scented with some essential oils.  I have a son who is 9mths and we were going to start trying again in September but I would not be upset if it happened early.  In fact, I would be ecstatic!!!  My husband wanted to wait a few months just because.  I told him the chances of me being pregnant would be slim due to using that oil.  But I am not positive on that.  Any advice?  I am pretty sure I am in prime ovulation due to cm.  I haven't been tracking my temp or anything yet so I am not positive but it is right about that time.  I always hated the TWW!!!  ughhhh.  

[tina1111]

It's probably not good for them, but I doubt it could kill all of them either. My dr said to stay away from lubes w/scent or "warming" when ttc. It's not the oil, like mineral oil, but the other ingredients that are bad.

[YvetteY]

They don't really advise using oil when TTC.   Like Tina said it doesn't kill all of them, but it's not the best.  I beleive there is one type of oil that is ok, but I'm not sure what type so sorry.  But if you need a lubricant try preseed, it's suppose to be sperm friendly, but it's costly.   However, it does not replace cervical mucous.