AquascapePRO (SFA) Pumps: Dilectric Oil. Mobile DTE Oil Light is a common brand.
AquascapePRO 1500: ~4oz
AquascapePRO 3000: ~4oz
AquascapePRO 4500: ~5oz
AquascapePRO 7500: ~5oz
AquascapePRO 10,000: ~12oz
Tsurumi PL & PN Series Pumps:
Tsurumi 3PL: http://store.aquascapeinc.com/p/replacement-oil-for-tsurumi-3pl
Tsurumi 5PL, 9PL, 3PN, 4PN, 8PN, 12PN: http://store.aquascapeinc.com/p/replacement-oil-for-tsurumi-5pl-9pl-3pn-4pn-8pn-12pn
AquaSurge Pumps: There is no oil in the AquaSurge pump line.
Ultra Pumps: There is no oil in the Ultra pump line.
Statuary Pumps: There is no oil in the Statuary pump line.