Question about lash adjusters

[Onefast99gsx]

I have my head apart and i was just doing some fore-reading on reassembly. My question is regarding the lash adjusters. I understand the cleaning part the manual states but reassembly it says to fill them with diesel fuel and not to let any of it spill out.

Now the vfaq says to fill them with motor oil, then turn upside down and depress the spring inside with a paper clip so the oil runs out and just leaves a small film of oil inside.

The vfaq says you never want these to be filled with oil because it can bend a valve.

So the factory manual says to have it full of diesel fuel and the vfaq says nothing inside of it. What do i do?

Thanks.