Oil obeys the laws of gravity, oil leaking from any joint above the oil pan will run down and appear to be a leaking oil pan gasket - a leaking rear main or crankshaft front seal, a loose oil filter, a leaking oil pressure switch, leaking valve covers, the list is endless, and so far, not specific to the Suzuki H27A engine that you have.
H series Suzuki engines also have their own quirks, there is an upper & lower oil pan, and a two piece block assembly with O rings between the two parts of the block and also between the block & the upper oil pan - whilst it would be unfair to describe these as known problems, they do give trouble if disturbed, as do the timing covers - in fact Suzuki has a TSB out on resealing these engines and warns that what may appear to be a leaking timing cover, is often oil leaking and running down.
What needs to be done is a thorough cleaning of the underside and then observation to find the source of the leak.
98 - 1.8 Mitsubishi Pajero iO
98 - 2.0 Suzuki Grand Vitara - SQ420
05 - 2.0 Suzuki Grand Vitara - JB420
Last edited by fordem; 10-22-2012 at 12:24 PM.
Reason: additional info.