Since my trans swap, my 1995 c1500 is getting 12mpg no matter how or where i drive it. 4l80e conversion with a sto k $od bin. My other truck with a 4l60/$0e is getting 14-18.

Id like to bump timing to start. Its common on these to add 2-4 deyat the distributor, but as im leaning tuning, id like to do this via the bin Nd tunerpro.

Cant seem to figure out how though.

Anyone have a link? Or walk me through it? Want to add to every cell in every spark table to start, then log and see if theres more that can be added in places by watching vacuum and knock counts.
But step one is wholesale adding.