Here in the North Country in the late sixties through the seventies 40's & 50's cars (Pontiac seemed to be the most popular) were routinely buried as a "complete residential septic system". Saved the cost of tank, leach field materials and got rid of the rusting hulk behind Uncle Joe's barn to boot. Run the soil line through a vent window, backfill, rake and seed.

The incredible thing is that these "septic systems" are only now, forty years later, beginning to fail, well beyond the design life of a conventional system! Yankee thrift at its finest.

Cheers,
Jim

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2005 C240 4matic wagon (daily driver)
87 190D - 225K (on loan)
85 190D - 312K (on loan)
2011 Subaru Legacy AWD (Wife's)