t1=# show default_with_oids;
 default_with_oids 
-------------------
 off
(1 row)

t1=# create table defoffwithoids(a int) with(oids=on);
CREATE TABLE
t1=# create table defoffwithoutoids(a int) with(oids=off);
CREATE TABLE
t1=# \d+ defoffwithoutoids 
                  Table "public.defoffwithoutoids"
 Column |  Type   | Modifiers | Storage | Stats target | Description 
--------+---------+-----------+---------+--------------+-------------
 a      | integer |           | plain   |              | 

t1=# \d+ defoffwithoids 
                    Table "public.defoffwithoids"
 Column |  Type   | Modifiers | Storage | Stats target | Description 
--------+---------+-----------+---------+--------------+-------------
 a      | integer |           | plain   |              | 
Has OIDs: yes

.
.
.
.


postgres=# show default_with_oids;
 default_with_oids 
-------------------
 on
(1 row)

postgres=# create table defonwithoutoids(a int) with(oids=off);
CREATE TABLE
postgres=# create table defonwithoids(a int) with(oids=on);
CREATE TABLE
postgres=# \d+ defonwithoutoids 
                   Table "public.defonwithoutoids"
 Column |  Type   | Modifiers | Storage | Stats target | Description 
--------+---------+-----------+---------+--------------+-------------
 a      | integer |           | plain   |              | 

postgres=# \d+ defonwithoids 
                    Table "public.defonwithoids"
 Column |  Type   | Modifiers | Storage | Stats target | Description 
--------+---------+-----------+---------+--------------+-------------
 a      | integer |           | plain   |              | 
Has OIDs: yes

.
.
.
.

postgres=# select version();
                                                 version                                                 
---------------------------------------------------------------------------------------------------------
 PostgreSQL 9.5devel on x86_64-unknown-linux-gnu, compiled by gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2, 64-bit
(1 row)

.
.
.

~$ /opt/postgres/bin/psql -V
psql (PostgreSQL) 9.5devel