...I'm wondering... does it really matter? I suppose it is not a smart idea to mix it, bat what about compleat change of oil?

which tip comes with car?

Dacia recommend to use...

ELF evolution SXR 5w-30 ACEA A5 /B5

or

ELF competition ST 10W-40 ACEA A3/B3/B4

go by the book (car manual)
especially within the warranty period

ok, fine... those two are synthetic and semi-synthetic.
My case. On first service (month ago) on 10000km, they put in new MINERAL oil. Whole service price was 4500din (~55e) ... few days ago, my friend with same car, paid same service 6500din (~80e) ... they said it was because difference in price of oils! ... he maybe get (god knows which) synthetic oil...

of course, same authorized service (reno sekulic, vetrnik)

...and ideas of what should I do?

...maybe to do next service few thousands km earlier, find recommended oil and bring it with me to service?

" ...the very first service, the one after a year is history...
The oil is Elf exellium LDX 5W-40, rather expensive ~10 €/l,
I`ve got last bottle with 0,5 l.
The price of service is ~ 7o € ..." - 6000 din .
Two months ago, the same authorised service
Look at your service book.

I just had a first service!

Thay changed my oil and they put Valvoline SynPower 5w-50, they also changed filter, put some Valvoline Fx Coolant in the water and added some wipers detergent and I paid for that 6700 dinara. I did that at service in Staro Sajmiste, Beograd.

For the oil I checked it on the net and thay sad it's good, but I first heard now about that oil.

Dacia is recommending Elf,

but pouring Valvoline

In service book there is nothig about type of oil, just - change...verified!
...so I probbly got some mineral valvoline...if i was lucky.
... nice.
... I'm thrill.

Valvoline

Are you 100% sure?



Well in some way, I'm not suprised........that they give you valvoline

Fisrt page of user manual:

ELF evolution SXR 5w-30 ACEA A5 /B5
Maximum protection in worst conditions

or

ELF competition ST 10W-40 ACEA A3/B3/B4

High performance for mixeed usage

Does anyone know what type of oil is originally suplied in a new car?

Yes, I am. Because they left me a bottle with 0.2l left in it.

And they put a big Valvoline commercial in front of the service center and spare parts store.

So, from now on it seems to me that the Reno, Nissan and Dacia in Belgrade will have only Valvoline oil.

Could somebody tell me something about that ol I mentioned and compare it to Elf oil?

Valvoline had a contract with DACIA long before Renault bought them. Then, Renault had to keep on using Texaco Valvoline for the first engine oil fill (and maybe for waranty service check-ups). It is a full synthetic motor oil and you should keep using this type of oil.