From your local Mobil oil distributor, the good price is around $240 inc GST for 20L drum. There is also Penrite Enviro+ 5W30 in 5L or 1L bottles, that is VW approved and cost around $60 inc GST(for 5L) if you shop around.
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I believe almost every Audi/Seat/Skoda/Volkswagen*, as well as BMW, Mercedes and Porsche, require an oil with a high temperature / high shear (HTHS) viscosity of > 3.5 mPa.s
Luckily, there is a quick method of determining this. If the oil meets either ACEA A3/B3, A3/B4, C3, or C4, it has a HTHS of >3.5. Mobil 1 ESP Formula 5W-30 has a HTHS of 3.56, so it is perfectly acceptable.
If it meets either ACEA A1/B1, A5/B5, C1, or C2, then the HTHS is <3.5. Mobil 1 5W-30 has a HTHS of 3.06, so that means we cannot use it, as it is too thin.
As you can see, it's not as simple as using any 5W-30 oil. But frankly, I'm not too sure if the average consumer can be bothered to know all this! I suppose the safest option is to use oils with VW approvals.
It would be convenient if Mobil sold it here in 4L or 5L bottles like they do in Europe, but it'll certainly be much better value buying in bulk anyway, as indicated by Transporter. Send Mobil an e-mail and they'll point you to your nearest distributor.
*except for engines that call for VW 503.00/506.00/506.01
*except for engines that call for VW 503.00/506.00/506.01
So what is suitable for the 506.00, can the 507.00 be used in that diesel? Is the number ranking backwards compatible i.e the higher the number covers the lower number.?
It seems there's always an exception when it comes to VW oil specs.
I should clarify that I just wanted to cover all bases, as unlike all the other VW oil specs, I believe that 503.00/506.00 and 503.00/506.00/506.01 are the only two that specify a HTHS of < 3.5 (min. > 2.9)
In any case, 504.00/507.00 does indeed supersede all previous specs, except (there's that word again) the R5 and V10 TDI engines up to 06/2006, which must use 503.00/506.00/506.01 regardless of service regime and with or without DPF.
Edit - beaten!
I find all of this very confusing. It kind of makes the price of a service worth it just so you don't have to worry about using the wrong oil!
Problem is, getting your car serviced at the dealer is no guarantee that they'll use 504/507 oils.
But anyway, those with FSI or TSI engines only need to look for 504.00/507.00 on the label - if it isn't there, don't buy/use it. Can't get much easier than that, really.
After reading the things in this thread and others, looks like I'll try some Penrite enviro+ 5W30. It appears approved for the 118TSI and people here seem to think it's pretty good. Can get it from a couple of places in Perth.
Question though- If you have have your car serviced somewhere and need an oil change, will they use oil that you supply if you ask them to?
Thanks
If they don't, then that's reason enough not to get your car serviced there.