Re: building my pc
The use of thermal paste is generally highly recommended to disperse heat more effectively. I think it is an extremely wise investment towards the longevity of your new $100-$300 processor for only $4-$6. I would not recommend using vasoline at all, but if the $5ish dollars is too much, I'm willing to bet a tech-forums member would be nice enough to send you a bit (I would, but alas I have none at the moment myself).
My Current PC-
Intel Q6600 G0 |Western Digital 250gb HD
Seagate 500gb HD | Western Digital 500gb HD | VisionTek HD4870 | 4gb Cruical Ballistix Tracer DDR2 800
850w Thermaltake PSU | Cooler Master Centurian 590 | 2x Dell 22" LCD
-900HA EEE pc