2015 Boxster S Manual
I noticed the oil temp drops about 15 to 20 degrees when I run in "sport" mode. Is that normal and if so, why?
Perfectly normal and my understanding is that an oil cooler is put online when sport/sport+ is enabled. Helps keep the oil from overheating during hard driving like on a track.I noticed the oil temp drops about 15 to 20 degrees when I run in "sport" mode. Is that normal and if so, why?
I believe higher engine operating temps in non-Sport/Sport+ mode has to do with meeting emissions requirements, however, another thought that came to me while writing this post (which I have no substantiation for) is that it may have something to do with reducing carbon buildup on the valves from the DFI. Also, if you switch to Sport/Sport+ mode before the engine reaches the higher operating temp, the ECU will not activate the lower temp setting until the engine reaches ~218 F.Not sure why Porsche chose to do that but it is what it is....
If you can support your statement with some research I might consider it. Otherwise I think that’s the most ridiculous thing I’ve ever heard.That is the way mine runs. I don't know why. But it is a reason you need to run in non-sport mode once in a while to boil off any water/moisture that might get in the crank case or oil.
Good information, thanks everyone. But some of this boiling conversation needs clarification. Remember water that is under pressure has a higher boiling point. ie, water boiled at sea level boils at 212 degrees F. At 6,500' it boils at 200 degrees F. With our coolant systems pressurized to around 20 psi the boiling point of straight water would be something north of 212 degrees. Also the coolant fluid such as we use in our cars also raises the boiling temp. to approximately 256 degrees to 260 degrees at 20 psi. Having said all that when heated the coolant fluid does off gas. That is why we sometimes get the smell of antifreeze coolant when we shut our cars down after driving in the non sport normal mode.Re to water/moisture being boiled off topic - it may be helpful to add that once the boiling point is reached, the resultant moisture/steam is then drawn out of the engine via the Positive Crankcase Ventilation (PCV) system which then routes it to the intake system where it is burned w/ the fuel/air and the exits via the exhaust. Prior to the entering the intake system is goes through Porsche's Air Oil Separator (AOS) which captures oil so that oil does not enter the intake. If you ever replaced an oil clogged PCV filter device, you will note there is often a milky gunk indicative of the water/moisture that was in the crankcase.