I use the Mahle pistons with 1.5, 1.5, 3.0mm file-fit rings and my engine never burns a drop of oil between changes.

I've blown it apart twice since the initial build: once for a bad cam and another for a bearing issue (my fault). Honed it, slammed it back together and zero issues. Set top and 2nd ring gap initially at .024.

'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.