Probably a few here but my point of doing this one is it's as close as I can get to the dealer bulk Castrol 5W40 VW uses (should be the same?) and I use this in my Atlas as the dealer has done the oil changes thus far and it's good to have a baseline.
![CASTROL EDGE 5W40-201012[12298]-page-001.jpg](https://bobistheoilguy.com/forums/attachments/castrol-edge-5w40-201012-12298-page-001-jpg.33182/ "CASTROL EDGE 5W40-201012[12298]-page-001.jpg")
Castrol Edge 5W40 VOA
- Thread starter TiGeo
- Start date
wemay
Site Donor 2023
I believe it's a 3.7 HTHS as well. Thanks for sharing.
From what I've seen on BITOG, all the Euro 5w40s are usually close to, or right on the border, with 5w30s. Not sure why this is the case.
As to OP, thank you for the VOA. I would be curious to see a VOA of the dealership oil seeing how VW has switch to Mobil for their oil. From what I know, VW dealerships always used Castrol Edge 5w40 "Professional" (same as the normal Edge but with a dye), but seeing how their bottles are the same as Mobil now, I am curious to get a VOA of what the dealerships are now stocking.
Mainly because although some European approvals list acceptable grades, that's not what the approval is aiming for. It's aiming for an HTHS which is a much better indicator of performance.
Thanks for sharing
Forgive me for my ignorance, but I had a question. I was under the impression that Castrol Edge 5w40 was of ACEA A3/B4 spec. If so, then why is TBN showing at 7.9? Doesn't A3/B4 require a TBN ≥10.0? Am I misunderstanding something here?
Difference between A3/B3 and A3/B4?
Can someone please explain to me the difference between A3/B3 and A3/B4? Most "euro" oils contain both specifications, however, in looking at high-mileage oils, Castrol EDGE High Mileage 10W-40 is A3/B4 while Mobil 1 High Mileage 10W-40 is A3/B3. Is one specification better than the other...
bobistheoilguy.com
Likely just lab variance with testing is how I would chalk it up. I've run several VOAs on VW502 00 oils and the TBN always is a bit lower than the spec sheet shows.
Makes sense, and good to know. I'll keep that in mind. Thanks.
Take into consideration guys that Blackstone said that bcs. most of analysis they do is UOA, their method is more accurate doing UOA than VOA.
KV100 is far off what Castrol claims, which is 14.2 as well as TBN, which probably indicates what Blackstone said that VOA won't be as accurate.
KV100 is far off what Castrol claims, which is 14.2 as well as TBN, which probably indicates what Blackstone said that VOA won't be as accurate.
Yes.....there are two different metods for testing TBN.... As @edyvw has stated....one for VOA and another for UOA....
Read that explanation on www.oil-club.ru once...
If you mix them...the results come slightly off...
Read that explanation on www.oil-club.ru once...
If you mix them...the results come slightly off...
In light of that new PDS, I can see what they did with this oil. They basically dropped down to pretty much W30 viscosity in order to get MB229.5 and still sell 5W40 package.
So Noack here is probably around 10%, and HTHS between 3.5-3.6. Since this is Castrol, they will not post HTHS numbers, so it is a guess.
I am now not sure why they are also selling 5W30 A3/B4 next to it as that is pretty much same oil.
Overall, mediocre package. Nothing stands out here. Not sure why buying this next to Mobil1 0W40FS or Castrol 0W40 on same shelf.
So Noack here is probably around 10%, and HTHS between 3.5-3.6. Since this is Castrol, they will not post HTHS numbers, so it is a guess.
I am now not sure why they are also selling 5W30 A3/B4 next to it as that is pretty much same oil.
Overall, mediocre package. Nothing stands out here. Not sure why buying this next to Mobil1 0W40FS or Castrol 0W40 on same shelf.
