Engine 850: B5234T/2.3/20v/T5: - Engine oil ?

chelle_belle · Mar 8th, 2020, 18:51

Hi,

The time has come to change the oil, its running fully synthetic but i dont know what grade or brand to buy, i hear these engines like castrol- what do you people use/recommend?

Thanks,

Craig.

Cookeh · Mar 8th, 2020, 20:03

Whatever brand of ACEA A3/B4 5W or 10W40 that you prefer. I like Mobil1's Super range, or Fuchs Titan.

AndyV7o · Mar 8th, 2020, 21:37

Just as above. 5w40 or 10w40 A3/B4 from a main big brand of your choice is all you need.
Just make sure it is A3/B4 (and preferably in conjunction with API SL as opposed to SM/SN/SN+ though this isn't quite the end of the world).

Derek UK · Mar 9th, 2020, 12:59

I've got a couple of 4 litre containers of Castrol GTX on the shelf. They are 10w40 A3/B4 but are marked as part synthetic. That would appear to match your description but are not full synthetic. Are the codes the same for full synth? It would seem unlikely.

Cookeh · Mar 9th, 2020, 13:11

Quote:

Originally Posted by Derek UK

I've got a couple of 4 litre containers of Castrol GTX on the shelf. They are 10w40 A3/B4 but are marked as part synthetic. That would appear to match your description but are not full synthetic. Are the codes the same for full synth? It would seem unlikely.

Both 5W40 and 10W40 viscosities meeting ACEA A3/B4 specs are available in fully synthetic or part synthetic grades. Not sure what about that seems unlikely.

AndyV7o · Mar 9th, 2020, 13:34

A3/B4 is 'Petrol/Diesel extended drain high hths' in a nutshell, though there are many performance requirements to be met too.
A semi or fully can meet spec, but that doesn't mean they are equal.
Also bear in mind that most 'fully synthetic' are essentially a 'super refined semi' in that they are still made from a mineral oil origin but even further refined or even deconstructed and reconstructed to some degree at molecular level.

Cypher007 · Mar 9th, 2020, 14:12

mobil one 0w40 for me.

Mar 8th, 2020, 18:51	#1
chelle_belle and Craig! Last Online: Apr 1st, 2024 06:25 Join Date: Jun 2007 Location: Manchester	Engine oil ? Hi, The time has come to change the oil, its running fully synthetic but i dont know what grade or brand to buy, i hear these engines like castrol- what do you people use/recommend? Thanks, Craig. __________________ Michelle and Craig. 855 R 855 T-5

Mar 8th, 2020, 20:03	#2
Cookeh Premier Member Last Online: Sep 14th, 2022 17:04 Join Date: Jan 2018 Location: Derbyshire	Whatever brand of ACEA A3/B4 5W or 10W40 that you prefer. I like Mobil1's Super range, or Fuchs Titan. __________________ 1995 Volvo 850 T5 Estate (Manual)

Mar 9th, 2020, 14:12	#7
Cypher007 Master Member Last Online: May 17th, 2024 09:12 Join Date: Dec 2001 Location: Lincolnshire	mobil one 0w40 for me. __________________ Volvo 854 T5R Yellow 1994 Aquamist 2D (Don & Aquamist) BMC panel filter (Don) Ferrita Cat Back (Don) Denso Iridium Spark Plugs (Hong Kong) PowerFlex Top Engine Mount (?) PowerFlex Wishbone Bushes (Elk Parts) 302mm front brake upgrade Goodridge front hoses (rears to be fitted later) 600W Inverter (ebay) History: 1991 Volvo 340DL (1982) 1994 Volvo 360GLE (1989) 1999 Volvo 360GLT (1988) 2002 Volvo 850GLT (1991) 2004 Volvo 850T5R (1994)

Mar 8th, 2020, 21:37	#3
AndyV7o Premier Member Last Online: Jun 21st, 2021 20:47 Join Date: Jun 2018 Location: Creswell	Just as above. 5w40 or 10w40 A3/B4 from a main big brand of your choice is all you need. Just make sure it is A3/B4 (and preferably in conjunction with API SL as opposed to SM/SN/SN+ though this isn't quite the end of the world).

Mar 9th, 2020, 12:59	#4
Derek UK VOC Member Last Online: Today 23:10 Join Date: Jul 2006 Location: Chatham	I've got a couple of 4 litre containers of Castrol GTX on the shelf. They are 10w40 A3/B4 but are marked as part synthetic. That would appear to match your description but are not full synthetic. Are the codes the same for full synth? It would seem unlikely.

Mar 9th, 2020, 13:34	#6
AndyV7o Premier Member Last Online: Jun 21st, 2021 20:47 Join Date: Jun 2018 Location: Creswell	A3/B4 is 'Petrol/Diesel extended drain high hths' in a nutshell, though there are many performance requirements to be met too. A semi or fully can meet spec, but that doesn't mean they are equal. Also bear in mind that most 'fully synthetic' are essentially a 'super refined semi' in that they are still made from a mineral oil origin but even further refined or even deconstructed and reconstructed to some degree at molecular level.

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