Mercedes A-Class Forum banner
41 - 59 of 59 Posts
Discussion starter · #41 ·
I'm at AMG 0W-40 (229.5) since service A and loving every drop.
 
The "w" in motor oil stands for winter. The first number in the oil classification refers to a cold weather viscosity. The lower this number is, the less viscous your oil will be at low temperatures.
A 0W is thinner than a 5W at sub zero temperatures.
(From Valvolene)

There are various schools of thought regarding 0W, some say that 0W will flow better at lower temperature therefore reach components faster, however there is no doubt that it also depends of a very efficient pump system to achieve this, some also say that 0W has been driven by the need for better fuel consumption and emissions figures, and in engines with more wear and larger clearances, 0W isn’t as effective as 5W at maintaining the same film strength between surfaces.

I have no doubt there is an element of truth on all sides, it is also true that 0W in recent years has also led to much more cold startup clatter at the top end!

Certainly for the UK, and Southern Europe where the OP is, we never see the anything approaching the winter temperatures seen in Northern Europe, where 0W would have the most benefit.
veeeight can you recommend a good oil then for the UK for a45 w176? maybe its smart to change oil before summer starts (the 3 days it last) and then change oil before winter starts?
 
Discussion starter · #47 ·
You try to run a 0W-20 or thinner in our blazing hot summer, not sure what this video suggests about using what's called for by the manufacturer will lead to anything good in a few years time. The 5W-30 will work better, but still not ideal in our environment. Several Audi S3 owners used to run that over the course of a few years and started noticing oil consumption that only got worse. Ended up with a whole liter in under 5k miles. I had an ED30 (exact same engine) and had the same issues. Never going to run a 5W-30 ever again, unless I can't source a 0W-40 anymore. Most, if not all, real VAG enthusiasts over here run a 5W-40 and have reported significant improvement in their engine operation and oil consumption. I'm sticking to my 0W-40 MB 229.5 and going to be running that for as long as it's available, anywhere in the EU. As of this year, it has been discontinued by my dealership so in May I had to purchase it from somewhere else. My second option would be the 5W-40 but to be honest, I like that mine is thinner when cold, definitely flows better in the first five minutes after a cold start.

That trend of using thinner oils is driven purely by emissions and fuel consumption standards. The manufacturer could give a crap about whether that will result in premature wear of your very expensive engine after a decade. Even my dealer themselves were honest enough to relate to my fear when I openly asked if they would actually comply with the new 0W-20 directive if they were me. That was couple of years ago, when the chief tech came out with my service advisor and informed me of the directive. Well they didn't exactly say no, but their face spoke volumes. No, they wouldn't either. See the thing is, if you're going to keep the car for like five years, which is what MB expects you to do when you're wealthy enough to be able to purchase an A45s, sure, I doubt anything seriously bad will happen. Well I don't, I intend to keep it for well over a decade, h.ell, I might set off to make it a performance ICE vintage, so long as it doesn't require expensive repairs.
 
For oil I’m going with Pennzoil Platinum Euro LX 0W-30 which meets the MB 229.52 standard. I’ve been using it in my Miata for several years with no issues. I’ll be changing my oil with a little more than 5K miles on the clock which is the standard interval I’ve changed all my cars for years.
 
Discussion starter · #52 ·
Yeah like @veeeight said it's 5.5 to 6 liters. In my last oil change I had 100-150ml left in the 6th bottle and it's showing full on the oil level screen. Every tech is different, they never put in exactly the same amount, I've also seen 500 and 250ml left. I would go with 250, which means you'll have a little over 5.75 liters, counting in whatever is left inside.
 
  • Like
Reactions: RS6BRIT
I guess you guys know that in the "workshop menu" (scroll down in vehicle data) you can see a more accurate reading of the engine oil level than the standard service menu. The workshop menu shows how much oil the sensor reads in the engine and how much to add to be truly at maximum level.
Here's a quick video how to access workshop menu (not by me). In my experience the normal service menu indicate full oil level up-to the workshop menu indicates 0.3L to 0.4L until truly full...........
 
Discussion starter · #54 ·
Nope, I did not know that. And it's true, the normal menu isn't accurate at all, I believe it could even be as much as 200ml off. Where do you go after selecting ASSYST PLUS to see the accurate reading?
 
Discussion starter · #56 ·
Morning all,

Finally got the car stage 2 mapped though I did request slightly lower boost than what I believe is a typical stage 2 as there is no way the turbo is happy with such high boost levels.

I'm wondering if I should change from 229.71 oil to 229.52 or just stick with 229.71 and just change it more often. I'm in N.Ireland so we don't really get hot days very often but I am thinking the engine temps will be hotter when playing with the car or if I take it to a Drag day.

Never did like the thought of 0w-20 but I could be just paranoid.

Curious to hear people's opinions.
 
Morning all,

Finally got the car stage 2 mapped though I did request slightly lower boost than what I believe is a typical stage 2 as there is no way the turbo is happy with such high boost levels.

I'm wondering if I should change from 229.71 oil to 229.52 or just stick with 229.71 and just change it more often. I'm in N.Ireland so we don't really get hot days very often but I am thinking the engine temps will be hotter when playing with the car or if I take it to a Drag day.

Never did like the thought of 0w-20 but I could be just paranoid.

Curious to hear people's opinions.
Personally I would go 229.52

And if doing a track day on a hot day - fill it with 40. And then change it back to 229.52 for “normal” Stg2 driving.

The primary purpose of 229.71 is for manufacturers to meet WLTP economy and emissions ;)

 
Personally I would go 229.52

And if doing a track day on a hot day - fill it with 40. And then change it back to 229.52 for “normal” Stg2 driving.

The primary purpose of 229.71 is for manufacturers to meet WLTP economy and emissions ;)

Thanks veeeight, 229.52 sounds good to me.

I can only imagine the heat the oil encounters flowing through the turbo it just seems to make more sense to run a thicker oil.
 
41 - 59 of 59 Posts