Ah, but the oil does keep transformers cool. Read the Wikipedia entry:
http://en.wikipedia.org/wiki/Transformer_oil
No need to get into a pissing contest, Bet. Since you obviously won't change your transformer oil for your laptop, have you greased your hard drive bearings recently? Sometimes you have to open your hard drive and repack the bearings to keep it running well.
And while you're at it, ever had a light stop blinking on your laptop? The only sure way to keep that from happening is with blinker fluid. You can buy it at the shop, right between the laptop transformer oil and hard drive bearing grease.