Well....the slant 6 oils "backwards" from anything else that has pressure fed lifters, since they do not have pressure fed lifters. So, the oil comes through the block, into the head, into the rocker shaft, through the rockers to the pushrods. If it is a hydraulic lifter engine, then the oil goes through the pushrods and finally pumps up the lifters. The mechanical cam engines just get splash lube from the crankcase and "whatever" happens to drool down the pushrods. This is why, IMO, the hydraulic lifter slant sixes never ran quite as well as their mechanical cam counterparts. There were problems with ticking lifters and lifters that didn't pump up correctly. Had they made the engines so they had pressure fed lifters from the rip, the hydraulic lifter engines would have been better. In either type though, you're not going to see oil "spray" in the top side of the slant 6. They oil adequately, they just don't oil "a lot" to the top.
