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2c/22o
x = 17, y = 24, rule = B2cik3-iky4aiknqz5-ackq6aei78/S2kn3q4j5-ejky6-in78
7bobo$5bobobobo$6b2ob2o$3b11o$4b9o$b15o$3b11o$17o$3b11o$b15o$3b11o$2b13o$2b
13o$2b13o$2b13o$3b11o$b15o$3b11o$b15o$5b7o$3bo3bobo3bo$7bobo$7bobo$7bobo!
Edit:
2c/20o
x = 17, y = 37, rule = B2cik3-iky4aiknqz5-ackq6aei78 ...

Reduction to 166 cells from 224 cells, also works in B3578/S178
x = 42, y = 26, rule = B357/S1
11bo3bo10bo3bo$9bobobobobo6bobobobobo$9bobo3bobo6bobo3bobo$7bo4bobo4bo
2bo4bobo4bo$8bo9bo4bo9bo$10b3o16b3o$6bo2bo2bo3b3ob2ob3o3bo2bo2bo$7bob
2o9b2o9b2obo$7bobobo5bo6bo5bobobo$7bo4bo16bo4bo$8b2o22b2o ...

P24

x = 1383, y = 63, rule = W150WithBorder
B3AB15.B4AB14.B2A.A.2AB21.B2A.A2.2A2.A.2AB14.B2A.2A3.3A3.2A.2AB9.B2A.
2A2.4A.A2.8A.3A.A.2A.A.3A.8A2.A.4A2.2A.2AB16.B2A.2A.3A.2A.2AB13.B2A.
2A.5A2.3A.6A.A.4A.2A.4A.A.6A.3A2.5A.2A.2AB14.10B20.B2A.2A.2A.2A5.2A.A
.2A5.2A.2A.2A.2AB19.10B20.B2A.2A.2A.2A3.2A.A.A.2A ...

A bit off-topic, but the above proof also seems to be applicable to spaceships that operate under similar mechanisms, such as those found at (specifically the ) https://conwaylife.com/forums/viewtopic.php?f=11&t=6352&p=224679#p224679
One can use this for the construction of the start of the ship:
x ...

2c/5o x = 25, y = 54, rule = B34kz5e7c8/S23-a4ityz5k
5bo13bo$4b3o11b3o$4bo2b2o7b2o2bo$3bo2bo2bo5bo2bo2bo$2b2obob2ob2ob2ob2o
bob2o$2bob2o3bo5bo3b2obo$bob3o2b2o5b2o2b3obo$2b3o6bobo6b3o$3bo17bo$6bo
bo7bobo$5b4o7b4o$6b3o7b3o2$6b3o7b3o$6bo3b2ob2o3bo$7bobobobobobo$5bob3o
bobob3obo$5bo5bobo5bo$7b5ob5o ...

2c/5o, c/3o, c/4o
x = 64, y = 21, rule = B34kz5e7c/S23-a4ityz5k
3bo15bo12bo5bo16b2ob2o$2b3o13b3o10b4ob4o13b2obobob2o$2bo2b2o9b2o2bo10b
o2bobo2bo13b2o5b2o$3b2ob5ob5ob2o10bobobobobobo10bo11bo$3bo3b2obobob2o
3bo10bo9bo10bo2bo5bo2bo$4bo3bobobobo3bo32bobo7bobo$5b2obobobobob2o$3bo
b4obobob4obo ...

c/3o, c/4o

c/8o partial:
x = 17, y = 91, rule = B2-ak3ce4eikqrz5-iknq6-ek8/S1c2aek3aekn4eiknry5eiky6-ei7c8
7bobo3$6bo3bo$2bob4ob4obo$3bo3b3o3bo$2bo2b2obob2o2bo$6b5o$2b2o2b
obobo2b2o$4bo3bo3bo$4bobobobobo$4b2o2bo2b2o$6b5o$5b2o3b2o2$3b4o3b
4o$4bo7bo$2b2obo5bob2o$3bo9bo$2o3bo5bo3b2o$2o13b2o$3b2o7b2o$2bob
o7bobo ...

Some oscillators:
x = 309, y = 39, rule = B2-ac3ceir4-aijkz5cjkn6-ce7e8/S02cin3cijkq4ceqtwyz5cjkr6-en7
o9bo10bo24bo14bo53bo66bo26bo$11bo8b3o8bo2bo10b3o12b3o11b3o38bo21b3o16b
3o22b3o24b3o$21bo9bo2bo11bo14bo12b3o17b5o16bo21b3o42bo26bo$31bo2bo10b
3o13bo28bo3b5o3bo42bo11bo91b3o ...

This rule seems to have interesting oscillators.
Here are some low period ones.
x = 191, y = 131, rule = B2ik3aceiy4enrtwz5kry6cei7c8/S1e2ik3jky4-cknry5-ekqr6cin7c
o19bo22bo16bobo17b2o21bo19bo18b2o18bo22bo$o21bo20bo17bo38bo2bo19bo20b
2o16bo22bo$20bo19b6o15bo20bo20bo19bo38bo17bo3b3o3bo ...

c/4d
x = 137, y = 151, rule = B2-ak3ce4eikqrz5-iknq6-ek8/S1c2aek3aekn4eiknry5eiky6-ei7c8
12bo$11bo3bo$12bob2o6bo$10bobob3ob2ob6o$11bo2bo5bo3b2o$11b2o2bo3bob3o
3bo$9b4obo7b2ob5o$8bob2o3bo6b2ob3o2bobo$7b2o14bob3o2bobo$8bo16b2o3bobo
$4bobo2bo15b7o$b2obob2o2bo14b3o3bob2o$ob3obo2bo3b2o12b2ob3o ...

This rule had more stuff than I expected.

Some low period oscillators:
x = 101, y = 62, rule = B2cin3aik4-anqrw5-ei6n7e/S12en3ejry4ceknq5cknry6-en8
o20bo19bo19bo$bo18bo19b3o18bo21b4o$21bo19bo40bo4b2o$61bo20bo6bo$81bo7b
o$81bo7bo$81bo7bo$81bo6bo$82b2o4bo$84b4o11$5bo14bo6bo40bo$4bo16bo5bo
39bo13bobo ...

Just a random thing I wanted to do, this will not be very useful.
Inspired by https://conwaylife.com/forums/viewtopic.php?f=11&t=4596
Every day I can post at most one randomly generated rule that is nonexplosive and possibly contains spaceships.

1. B2cin3aik4-anqrw5-ei6n7e/S12en3ejry4ceknq5cknry6 ...

Some conduits:
x = 17, y = 57, rule = B2-ak3ce4eikqrz5-iknq6-ek8/S1c2aek3aekn4eiknry5eiky6-ei7c8History
15.A$12.A2.2A$12.2A$12.A.A$12.4A3$2C11.2D$C12.D$2C11.2D3$12.4A$12.A.A
$12.2A$12.A2.2A$15.A6$7.A$7.2A$6.A4$.A$2A$2.A4$5.2D$5.D$5.2D6$2A$.A6$
.2A7.2A$2.A7.A$2A3.C.C3.2A$.A3.3C3.A2$3A7.3A$3A7.3A$2 ...

rt 72 90 degree c/2o->128c/938o
x = 13, y = 92, rule = B2-ak3ce4eikqrz5-iknq6-ek8/S1c2aek3aekn4eiknry5eiky6-ei7c8
7bo$7b2o$6bo4$bo$2o$2bo12$2o$bo6$b2o7b2o$2bo7bo$2o9b2o$bo9bo2$3o7b3o$
3o7b3o$2bo7bo17$6bo$5bobo$5b3o$4b5o$5b3o32$6bo$5bobo$5b3o$4b5o$5b3o!



That has rt 248 as a reflector for the ...

3c/7o partial:
x = 21, y = 129, rule = B3/S23-a5
6bo7bo$5bob2obob2obo$4b2obobobobob2o$3b3o3bobo3b3o$5b2o2bobo2b2o$bo2bo
bo2bobo2bobo2bo$bo5bo5bo5bo$2ob3obo5bob3ob2o$4o3bo5bo3b4o$4bob2o5b2obo
$4bob2o5b2obo$3bo6bo6bo$5bob3ob3obo$2bobo11bobo$3bo2b3obob3o2bo$7b3ob
3o$4b2o2b2ob2o2b2o$5bo9bo$5bo9bo ...

Smaller 2c/5o:
x = 21, y = 23, rule = B3/S23-a5
4b3o7b3o$4bo2bo2bo2bo2bo$2bobo2bobobobo2bobo$2bo2bobobobobobo2bo$b2ob
2o3bobo3b2ob2o$2bo2bob3ob3obo2bo$2b2o3bobobobo3b2o$2bo4bobobobo4bo$3b
2o4bobo4b2o$3b2o4bobo4b2o$8bo3bo$4b2o3bobo3b2o$4bo2b3ob3o2bo$4b2o3bobo
3b2o$7b2obob2o$2b5o7b5o$bo5b7o5bo ...

c/3o wave:
x = 244, y = 30, rule = B2-ak5j/S12-k
19bo12bo34bo12bo34bo12bo34bo12bo34bo12bo$18bobo10bobo32bobo10bobo32bob
o10bobo32bobo10bobo32bobo10bobo$12b3o7bobo2bobo7b3o20b3o7bobo2bobo7b3o
20b3o7bobo2bobo7b3o20b3o7bobo2bobo7b3o20b3o7bobo2bobo7b3o$14bob2ob3o2b ...

97c/452o based on some results from nimblerogue:
x = 3792, y = 6841, rule = B2-ak3ce4eikqrz5-iknq6-ek8/S1c2aek3aekn4eiknry5eiky6-ei7c8
884b3o24b3o1964b3o24b3o$884b3o24b3o1964b3o24b3o$884bobo24bobo1964bobo
24bobo$884b3o24b3o1964b3o24b3o2$892bobo8bobo1980bobo8bobo$892b3o8b3o
1980b3o8b3o ...

213 nrss (can easily find more with qfind)
c/2o, 8c/56o, 342c/2397o, 286c/2005o, 282c/1977o, 274c/1921o, 270c/1893o, 258c/1809o, 250c/1753o, 246c/1725o, 242c/1697o, 238c/1669o, 234c/1641o, 230c/1613o, 226c/1585o, 222c/1557o, 218c/1529o, 214c/1501o, 210c/1473o, 206c/1445o, 202c/1417o, 392c/2750o ...

3c/8o w10 o in B2ce3jny4j6ci7e8/S01e2ik3aejnr4air5iry6aci8

This is the highest possible 2 cell oscillator in an INT rule is this, with a period of 8:
x = 3, y = 3, rule = b2-a/S012-e3a4a
o2$2bo!
[[ GPS 10 ]]

What is the highest period oscillator known with 3 cells in an INT rule?
The highest I know of is this, with a period of 12:
x = 4, y = 5, rule ...

212 NRSS:
c/6d, c/2o, c/3o, c/4o, c/5o, c/6o, c/7o, 22c/157o, 18c/129o, 32c/230o, 46c/331o, 14c/101o, 94c/679o, 52c/376o, 38c/275o, 62c/449o, 24c/174o, 82c/595o, 58c/421o, 92c/668o, 34c/247o, 78c/567o, 44c/320o, 98c/713o, 54c/393o, 118c/859o, 64c/466o, 138c/1005o, 74c/539o, 158c/1151o, 84c/612o, 94c ...

190 nrss:
c/2o, c/3o, c/4o, c/5o, c/6o, c/7o, 22c/157o, 18c/129o, 32c/230o, 46c/331o, 14c/101o, 94c/679o, 52c/376o, 38c/275o, 62c/449o, 24c/174o, 82c/595o, 58c/421o, 92c/668o, 34c/247o, 78c/567o, 44c/320o, 98c/713o, 54c/393o, 118c/859o, 64c/466o, 276c/2010o, 74c/539o, 84c/612o, 94c/685o, 104c/758o ...