2000 E39 540i Touring Vermont Green
I'll be doing an oil change on my E39 540i next week using a mityvac and am just wondering how warm the oil needs to be when using the extractor? I know it's not an exact science, however Mityvac state that the oil should not exceed 80 degrees centigrade, and even though it's unlikely, the last thing I want is bits of plastic tubing melting off inside my sump. As my car doesn't have an oil temperature gauge, how long should I run it for in the garage from cold before the oil change? Fully up to operating temperature then allow to cool down for a while, just run for 10 minutes, etc? Any feedback and advice from mityvac users would be appreciated. Thanks.