How do I enable mutli-threading in the game "Elder Scrolls - Oblivion"?

Open Oblivion.ini (which is located in My Documents/My Games/Oblivion)

open the file in notepad and find the variables as shown and change their value appropriately

bUseThreadedBlood change 0 to 1

bUseThreadedMorpher change 0 to 1

bUseThreadedTempEffects change 0 to 1

bUseThreadedParticleSystem change 0 to 1

bUseMultiThreadedTrees change 0 to 1

bUseMultiThreadedFaceGen change 0 to 1

iNumHavokThreads change 1 to 5

iThreads change to 9

iOpenMPLevel change to 10

All of the above settings seem to relate to the use of the GameBryo engine's multithreading capability (See Neat Stuff & Conclusion section). Multithreading splits tasks into 'threads' where possible, and runs them in parallel across both cores of Dual Core or HyperThreading (virtual dual core) CPUs to improve performance. Note that raising the values of the iThreads, iNumHavokThreads and iOpenMPLevel settings very high doesn't automatically mean it uses that many threads - it all depends on how many threads are actually possible based on the information being processed.