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Oil Selection Query #5395423 04/06/20 12:00 PM
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moonlightblue Offline OP
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Hello everyone,

I hope you are all doing well on these hard days.

I have an audi a5 1.8 turbo gasoline (2010) tfsi 118kw, and have an a bit increasing oil consumption problem since some time.

It all started since a year but I probably noticed the increase abit later. I suspected from the authenticity of the oil that I added on top of the oil inside and immediately switched to different brand from different seller (a month ago). And the car was driven with the suspicious added oil (about 2 liters in 2000km) for 2 months. The rest of the oil inside engine was 4 months old (max 5000kms). But although the oil inside the engine was from a different seller, I started to suspect from that one as well later on. But before that oil change there was also a bit increasing oil consumption, however I can not remember the details as I mostly kept the car in garage last summer when I travelled around.

I hope that the oil did not damage the engine as I started to have suspects about it.But its too long ago and I already replaced the oil filter (from the dealership) and oil (different brand from the distributor).

It is now 2000 km since last oil change (1 month ago) and I already added totally 1.5 liters of oil in smaller amounts at different times. In the past it was 1/5 liters in around 6000 7000 kms.

Last month I also replaced the PCV valve with the genuine one (old version ending with AH) as a preventative maintenance. And there is no change at oil consumption.

The car always had 5w30 oil since new. And since 3 years of my ownership I always used mobil 5w30 c3 esp (I change oil at every 7000-9000km). Last month,I switched to Liqui Moly 4200 5w30 at last oil change.

To reduce the consumption I am thinking now to switch to Mobil 1 0w40 or Liqui Moly 5w40 oil. And got confused as I dont know whether it is better to choose a3b4 version or c3 version of those brands (both have vw502 approval).

The car manual recommends vw504 for longlife and vw502 for control service. And it says that I should not add more than a liter of a3b4 oil.

In this case can I use any Vw502 (whether a3b4 or c3) ? Or should I use Vw502 c3 only?

I see people with tfsi engines using mobil 1 0w40 but they never mention whether it is the New Life (a3b4) or ESP (c3). Which one do you recommend to reduce oil consumption as much as possible?

Can I really use vw502 where vw504 is recommended ? Arent those two approvals designed for different engines?

Look forward to get answers to my questions.

Many thanks in advance.

Re: Oil Selection Query [Re: moonlightblue] #5395452 04/06/20 12:37 PM
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BMWTurboDzl Offline
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“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Oil Selection Query [Re: moonlightblue] #5395468 04/06/20 12:56 PM
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UG_Passat Offline
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Is your car set up for the flexible service interval? If so, use 504.00 as prescribed, as 503.01 oil is getting harder to find.

if fixed, then 502.00 A3/B4, is suitable especially since it predates the OPF (Otto particle filters) installed on newer engines which need a lower SAPS oil.


2016 VW Tiguan|APR Stage 1|Neuspeed P-Flo|Osram CBI|Redline 5w30
Re: Oil Selection Query [Re: UG_Passat] #5395472 04/06/20 01:05 PM
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moonlightblue Offline OP
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Originally Posted by UG_Passat
Is your car set up for the flexible service interval? If so, use 504.00 as prescribed, as 503.01 oil is getting harder to find.

if fixed, then 502.00 A3/B4, is suitable especially since it predates the OPF (Otto particle filters) installed on newer engines which need a lower SAPS oil.



I really dont know what you mean? How can I know whether the car has been set up to flexible service interval? Is it possible to change it?

Re: Oil Selection Query [Re: moonlightblue] #5396082 04/07/20 06:47 AM
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BMWTurboDzl Offline
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Originally Posted by moonlightblue
Originally Posted by UG_Passat
Is your car set up for the flexible service interval? If so, use 504.00 as prescribed, as 503.01 oil is getting harder to find.

if fixed, then 502.00 A3/B4, is suitable especially since it predates the OPF (Otto particle filters) installed on newer engines which need a lower SAPS oil.



I really dont know what you mean? How can I know whether the car has been set up to flexible service interval? Is it possible to change it?


Examples:

Fixed interval change oil every year
Flexible interval change oil whenever the car tells you.

Like I said early. Your engine is apparently prone to oil consumption regardless of whether you use ACEA A3/B4 or C3. It shouldn't make a difference.


“It took untold generations to get you where you are. A little gratitude might be in order. If you’re going to insist on bending the world to your way, you better have your reasons.”

435i
Re: Oil Selection Query [Re: moonlightblue] #5396972 04/08/20 12:24 AM
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GZRider Offline
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Mobil1 5w30 ESP and Ravenal VMP both meet the higher spec, and are very good oils. They would be my go to in the US, but our oil prices are kinda atypical cause of reasons we shall not discuss here. If Mobil1 0w40FS is cheaper then those, then use that. It is also excellent.

Re: Oil Selection Query [Re: GZRider] #5397354 04/08/20 12:02 PM
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moonlightblue Offline OP
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Originally Posted by GZRider
Mobil1 5w30 ESP and Ravenal VMP both meet the higher spec, and are very good oils. They would be my go to in the US, but our oil prices are kinda atypical cause of reasons we shall not discuss here. If Mobil1 0w40FS is cheaper then those, then use that. It is also excellent.


Prices are nearly same but it is more likely to get fake oil in case of choosing Esp 5w30 in my opinion. I will buy from authorized seller online and I will be extra carefull on every single detail. Thank you for your suggestion. I think I will not wait anymore and switch to Mobil 0w40 FS although it has been only 2000km since the last oil change. I know it is waste of money but risking the engine would be a big risk to take.

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