I reckon you've done the right thing G/F Dave. I'm still intending to do the same. If the thing's put in the right way up, I can't see any reason not to - the oil will fill the filter and then carry on up to the tank cos there's owt to stop it unless the filter element is blocked (I use 20/50 usually). It couldn't drain back into the crankcase, and there will therefore be oil for the rocker feed take-off same as usual. Can't see a downside. Has to be a lot better than what's there, which is where I started. Your experience makes total sense to me. Glad to say that when I drained the crankcase yesterday there was nothing nasty visible (except loads of clean oil), which pleased me. At the moment I'm trying to make a feed-line tap that works and will fit in the space available without my having to re-route the pipes in too ugly a fashion. But I'm also thinking about cause rather than symptoms - the A10 I had as a mad youth never did this, and it was the proverbial heap, went through several slung-together-on-a-budget-of- nothing engines and never appreciably wet-sumped. So I guess I'll have the plumbing apart, look at the pump etc and see if anything is obviously not kosher. As to a filter on the feed side - that could be a recipe for a disaster unless one could prime it easily every oil change . . . not sure it would ever be a good idea on a dry sump engine. And a double disaster if one had a tap tank-side of the filter, the filter drained into the crankcase overnight and it took a couple of mins for the pump to suck the filter full before any any new oil got where it's needed. Ah well, what do I know, back to the shed . . Groily