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Robert
Robert, BMW Technician
Category: BMW
Satisfied Customers: 4636
Experience:  Fully qualified 19+yrs exp/self employed technician in the UK
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Series3 320i touring, what consumption of oil can one expect

Resolved Question:

Series3 320i touring, what consumption of oil can one expect after 100000 miles example 1lt per 1000 miles
Submitted: 2 years ago.
Category: BMW
Expert:  Robert replied 2 years ago.

Hi..there..

What weight oil are using in the engine at the moment?

Has there been any issues or any blue smoke from the back end/tail pipe?

Customer: replied 2 years ago.
Changed from 30 to 40 castrol. No smoke
Expert:  Robert replied 2 years ago.

Hi..there..

These engines in these cars are pretty well known for oil usage - normally it quite acceptable to see usage around 1litre to every 1000miles - the fact that yours is burning it heavily within a litre to 400miles certainly doesnt sound good in fact that's seriously bad - and quite surprised to read you dont get any tell blue smoke at all even at startup or under heavy load/throttle..if it was burning that much you would without a doubt get at least some sort of blue smoke...if its burning that much then the emissions test would be somewhat high or fail..have they done that yet.... i note you have done/checked the breathers/ccv/oil sperator valve - have you actually 100% sure there are no leaks on the engine itself..especially around the rocker cover/oil filter housing can be areas that are common for leaks...but like i say above these engines can be problamatic for oil usage and results around the incomplete and or improper break-in of the engines when synthetic is used exclusively during the break-in period...Obviously the routes to solving this is as you mention in regards ***** ***** rebuild - replacing the rings/oil rings/valve stems/seats etc..but is is a hugely expensive task but it would likely solve the problem to some degree considering the cylinder walls could be suspect - sometimes it might be even less expensive to just put in another engine short block and just transfer all the ancillaries over from the old engine to the new...or use a slightly heavier weight oil to help reduce the consumption and live with it...these are about the 3 options open to be honest..

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Customer: replied 2 years ago.

We agree in general with your observation , however having checked by draining down after 400miles we found only 2.5lts this from the max position. As concerns a rebuild my engineer has quoted £1000 plus vat so this would be ok for me , but I question why this should collapse from 1200per/lt I take your point about breaking in will let you know what we fin my tel/no *********** thanks. Bill Cox