238/346/3

[TWLife]

This rule is interesting especially because of its ALMOST exploding tubs, and whenever a pattern is about to die out, a tub usually appears and explodes outwards until its debris destroys it, for example, this 8 cell pattern lasts for 8400+ gens.

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x = 9, y = 3, rule = 238/346/3
.A5.A$A.A3.A.A$.A5.A!

I need a name for this rule as well, anyone have any suggestions?
I realized that the only 3 stable objects in here are blocks, boats, and beehives, there are no oscillators or ships either.( I'm pretty sure)

[towerator]

Interesting...
Only symmetrical methusaleh seems to work, sinc the tubs need symmetry.
Why not "symmetrical chaos"?
Also, there's anothe still life: the long ship also works
EDIT: the best methusaleh seem to have one, and only on symmetry axis.
here's a 45K long 3 tubs interaction

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x = 18, y = 3, rule = 238/346/3
.A8.A5.A$A.A6.A.A3.A.A$.A8.A5.A!

[Rhombic]

Gliders explode the same way as tubs.

[towerator]

Here's a 52424 methusaleh. It is only made of 9 cells!

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x = 3, y = 5, rule = 238/346/3
.A2$3A$A.A$3A!

the "glider" is a tub relative

[TWLife]

I'm surprised nobody's found a spaceship by putting something behind the tub yet, but I think it's possible

[Tropylium]

I need a name for this rule as well, anyone have any suggestions?

I've explored the related rule 238/3478/3, which I've dubbed "tubnificent".

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x = 3, y = 3, rule = 238/3478/3
.A$A.A$.A!

(6839 generations from 4 cells: pretty good I think.)
Yours seems to have a slightly smaller basic explosion — how about something like "tubstellation"?

I realized that the only 3 stable objects in here are blocks, boats, and beehives, there are no oscillators or ships either.( I'm pretty sure)

These and other S23·D1456/B34·A5/3 rules support this c/4 spaceship I call the "rollerskate":

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x = 5, y = 6, rule = 238/346/3
3.2A$3.2A$2.3A$.3A$2A2.A$.B2.B!

Also a puffer using one or two tub engines is probably possible in your rule too, in the style of these ones I've found:

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x = 33, y = 3, rule = 238/3478/3
.A29.A$3A27.3A$.A29.A!

(creates two high-period puffers eventually)

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x = 24, y = 17, rule = 238/3478/3
4.A14.A$3.3A12.3A$4.A14.A$.A5.A8.A5.A$3A3.3A6.3A3.3A$.A5.A8.A5.A$4.A
14.A$3.3A12.3A$4.A14.A7$11.2A$11.2A!

(instant 21c/72 puffer)