Damn oil drain plug

[Dime]

Well, was just out trying to change my oil. Easy enough right? Well I don't know what the hell I did last time (apparently I was mad and juicing at the time), but I couldn't get the plug to budge one bit. Started to round the plug some.

So, being the genius I am, I just grabbed a set of vise grips knowing that this would get it loose. ("I'll just order a new plug anyway.") Tapped it a bit, pulled and pulled, and rounded the plug some more.

Question is, applying heat safe?

I'll go back out tomorrow and see if I can get a cheater bar on there some how as well.

Thanks