- Feb 26, 2014
- Kent, UK
- ‘15 C63, ‘15 CLS63, ‘01 E55, 01 ML55 ‘16 Vito 119CDI
Been quite a few threads on this in the past including US forums. Many M157 engines do use around a litre per 1000. Lots of owners record their mileage/use age to keep track which is a good thing. The only watch out is if oil usage gets excessively worse (obviously will do so when driven hard in warmer conditions), then it could be an indicator of a problem. From memory I think anywhere from 1L per 800 up to 1500 was most common with a few cars with better consumption rates at up to 4000 miles. Can’t think of one turbo charged car I’ve had that hasn’t used oil. Theories for the variance are how the engine is assembled, how the engine was ran in, the type and grade of oil being used and how hard the car is driven. Other modern cars / marques are the same if not worse Audi / BMW etc.
I would definitely mention it to them, maybe by email with acknowledgment - just in case it develops into something sinister. Forum member Dennis (aka E55BOF) has an identical year/model car with circa 80k ish miles IIRC that started to use a bit of oil (not sure how much, just says higher than expected) and ended up with a sick engine shortly after :-(
It's Not A Good Sign When...
Bellow said:Chicken or egg?
E55BOF's 'problem' was unrelated to what was found. Begs the question, is the increased oil consumption a precursor to bent rods or a symptom of?
I have a theory which says that modern engine management systems really do not cope well with high rates of oil consumption (and can push them into failures which wouldn't otherwise occur). Anyone else with anything to say on this?