This has absolutely nothing to do with the car's RPMs, and everything to do with a turbocharger and how it operates.Wd40 wrote:Dont worry nothing will happen. Car RPMs are how much? 4000-6000?zzm9980 wrote:Keep that oil clean and install an oil cooler (if it doesn't have one already).offshoreoildude wrote: Well mine's a turbo but my very light footed wife does most of the km/miles now so I think it will last a long time yet.
Given Singapore's heat I'd even consider a turbo timer to prevent oil coking.
Motorcycles run at 8000+ RPM at highway speeds and require much higher cooling, yet air cooling does the trick.
But I agree with your point, change oil frequently for cars every 5k and bikes every 2k Kms
Turbochargers use the engine's oil as coolant, and regularily run at extremely high RPMs, some in the 100k+ RPM range. A small OEM turbo charger can get orange or even white glowing hot during normal 'spirited' driving. Turning off the engine immediately stops engine oil circulation and the oil inside the turbo charger 'cokes' (not cook) and it can break down, clogging the turbo charger, and losing its protective properties for the rest of the engine. So you leave the engine idling for a few minutes before you shut it off to keep oil circulating while the turbo charge cools off.
A turbo timer is a small electronic box that will keep the car idling after you take the keys out for a specific period of time (my old one was 1-6 minutes depending on how long you drove the car), and then shut off the engine after. Any attempt to hit the break, or change the gear will kill the engine immediately.