mteogr wrote:
You said that ester based are better but is that for daily use?
I saw motul sport 5w40 which is ester but it is API SM.
Also Motul x-cess 5w40 is a3/b4.
All the oils you've mentioned are good for your car, so this is the reason why what I'm going to write next may look like a mix of feelings about using this or that. You will have to decide based on how you use the car and I hope my recommendation at the end will help.
The Ester synthetic oils are perfectly fine for daily use. I used Motul ester Sport 5w40 (and 5w50) in the past and this is a good oil except for the fact that the detergent content is relatively low and so is the sulphated ash (0.8%, kind of a mid-SAPS oil). So it may require a 2.5-3k miles change interval because of that. If you're already changing the oil about as often (I do) then it's perfectly fine as long as the price works well for you.
Motul X-cess is very good for street use, is more of a street oriented oil compared to the Ester Sport which is race oriented but also works on street. The x-cess is not Ester synthetic though, but still a good oil.
This year I switched (again) from Motul Ester Sport 5w40 and 5w50 to RedLine 5w50, so in your car you could use RedLine 5w40 (the normal 5w40, NOT the euro formula which is ACEA C3). By the nickname I'd say you're in Greece but if you're in the US then RedLine may be a good option as it's around $10 a quart there, while where I live I pay about $25 for a quart (yeah, and I have 3 cars, 2-3 oil changes/year in two of them, 5/year in the 3MPS, my budget is screaming).
Also, no matter what oil you're using watch the oil consumption closely. It's not a problem if your engine uses a bit of oil, but if it uses oil because of the rings/valves and not because the turbo pours it into the exhaust keep in mind that the ester synthetic oils do not burn as clean as a fully synthetic oil and not even by far as clean as a semi-synthetic. Because of this the intake valves will get clogged a bit faster if you do not have additional port injection (meth or sequential PI), and the oil rings will clog faster than with a full or semi synthetic oil (in such situations valve and oil rings clogging will happen regardless, but it will happen faster with ester synthetics oils if you have an oil consumption problem).
The extra mechanical protection and lubrication you get from Ester Synthetic oils starts counting when the engine is running hot, is under extreme load or both (track days, drag strip). Their main argument over the fully synthetics is the lower shear at high temperatures and/or mechanical loads. Otherwise on normal street use (including spirited driving, isolated pulls) a fully synthetic will be just as good and will also be cheaper.
So considering that so far you were using an A5 oil with a slightly lower viscosity than what these engines would normally like I'd say go with the x-cess 5w40 (and do it as soon as you can, if you continue using the 5w30 you may loose the turbo - which is not necessarily a bad thing).
If the winters have negative temps where you live then during that time you can use the 0w40 they have, I think it's nergy or something, and I remember it's also A3/B4.
Also, no matter how many miles you put in your car, make sure you don't make it to the summer with the oil you used during the winter and the other way around. Oils wear differently during summer and winter. Usually people who put a small amount of miles/kms on their cars tend to be in this situation.