Burning oil after re-jetting 454

TRBenj wrote: Main jets aren’t in play at idle. Something else is buggered, perhaps when you disassembled/reassembled. Why were you rejetting?

The plug electrodes were still white/new looking after several hours of
run time so I figured it was to lean, It’s running better now to, but smoking at idle.
Using aimsoil 10w40 marine oil

I started to have an issue burning oil on my 454, I noticed blue smoke at idle after stepping up two jet sizes to 74 primary 89 secondary. The smoke smells gassy and not like the typical burning oil smell.

The jets in there before were 72/87, and the plug electrodes were white with no color after a few hours of use. The 74/89 started to give the plugs a golden brown color after an hour, but now all the plug electrodes are black. I also replaced the pcv valve to see if that would help.

One weird thing is that it doesn’t always smoke it seems to be intermittent. Could stepping up the main jets to much cause fuel to wash oil off the cylinder walls and burn at idle or maybe a high float?