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E39 M5 (1998-2003)

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Old 05-05-2015, 05:45 PM
E39M5E46M3 E39M5E46M3 is offline
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Join Date: Apr 2015
Posts: 33
Mein Auto:
Oil consuming beast

I got a e39 m5 a few weeks ago and I've heard they consume oil like no one's business and I need to know when to change the oil. I may be an idiot for not waiting for the car to tell me but just in case id like to know about how many miles you can go on one oil fill up.

Last edited by E39M5E46M3; 05-05-2015 at 05:51 PM.
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Old 05-09-2015, 12:35 PM
ard ard is offline
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Location: Sierra foothills
Join Date: Jul 2009
Posts: 11,975
Mein Auto: '12 X5 35d/E39M5/996TTX50
7500 on good synthetic (10W60, TWS or liquimoly)

If the sticker says 5w30 ignore it
Keep it as simple as possible...but no simpler.
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Old 05-13-2015, 12:36 PM
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mark_m5 mark_m5 is offline
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Join Date: Sep 2006
Posts: 5,264
Mein Auto: 2002 M5, 1999 M Roadster
I haven't checked my oil in ages. I think oil consumption is directly related to how beat up the engine is. If the car hasn't been thrashed, and has been well maintained, it should not consume much oil at all.

You might do a pressure test and leak-down test, and check for dripping leaks on the engine, if you're concerned about oil consumption. There are only a few ways oil can leave the engine. One is by getting by the rings around the pistons and getting burned (a sign you might need a rebuild), another is down valve guides and getting burned (new/rebuilt top end might help), another is through crank-case ventilation (though S62 has lower than typical negative pressure), and the rest are the various seals (valve cover gaskets, etc.).

Grammar: The difference between "knowing your sh*t" and "knowing you're sh*t."
"A world that is 'idiot proof' is a world that is only fit for idiots." - Racer X / 6'er
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