Using Larger Oil Filter?

[cfg83]

Hello -

I was wondering about this post by CheapyBob :

Switched to Amsoil today.

Originally Posted by cheapybob

My race car dynoed 20 more hp when the oil level was reduced 1/2 way down the dipstick instead of at the full line. I do the same on my Saturn as I figure the same drag that would reduce hp would also reduce mpg. I run a larger filter, which is below that height, and increases oil capacity by 1/2 pint to offset.

My questions are :

1 - What do you think of using a larger oil filter for MPG?
2 - Are most oil filter connectors the same? If yes, then it's moslty just an issue of clearance.
3 - If it helps MPG, then how? Would it be because the area of the filter is larger or there is less pumping losses?
4 - Could the engine be hurt in some way?

Thanks,

CarloSW2