Cylinder #2 is down 50% vs the other 3

That explains a lot.... 2.5 years and 12 bottles of 100shot, and I guess I'm finally going to have to take the valve cover off....
How can you tell if you've got a blow head gasket or busted rings/piston ?
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86' snapper electric powered lawn mower.
95' F-350 crew-cab powerstroke 5-speed 21.63mpg
03' G35 6-speed coupe. Grey on black.
02' wranlger apex edition with EFI 5.0L 302 SBF. 5.5'' lift, custom 4-link 8.8 in the rear, high pinion D30 front with locker.
A wise man once said, " I didn't wash my hands b/c my D**K is cleaner then ANYTHING, in that bathroom"