I've thunked about fitting the thermostat mod, as the newer Sportstars have, but Like Bass says, just make sure the oil is good for the temp and change it a bit more frequently.
Most of my ops are only about an hour so the oil seldom gets hot enough to boil off any water. When I do go for a long sortie, I make sure there is plenty of oil to factor for the boil off. Beside, taking a bit more time for warm up and run up means more time to do checks again.....and again....and....
Or does it mean that Sportstars are just ...... Cool! :clown:;)
Had the same temp problems in the Lightwing, with the 912S. Everything goes to the middle of the green after takeoff, but at cruise back into cold territory, at bottom of green. I was sitting there most of the time in cruise (2hrs plus) wondering if the main bearings, and crank were warm enough.
I always do a good warm up though, before takeoff, and temp guages are usually on the way up at least, but never where the book recommends. If you waited for that you would just loose interest, and put the damn thing back in the hangar !.
The last two winters I manufactured small alum plates to put over both the oil and coolant coolers. They cover about 50% of cooler surface, and the temps sit right in the middle green at cruise, where I like them.
As it gets warmer you have to watch the oil temp after take off, as it wants to get hot and eventually that plate gets removed for summer.
This Summer I have left the coolant cooler plate on, and things seem to be fine all round. If you try plates, you may have to adjust the area covered for your particular installation/engine etc. I would't recommend these plates out bush where it gets real hot, but they should be fine around the coast.
Also have a lowish oil pres reading most of the time, but as Wally says "as long as it's in the range in the book,it's right" I don't worry too much about that. Mine starts at just below 4 bar and then sits at around 3 bar or so, once warm. The 912s does sound much more content when the temps are right.