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What exactly is the A5/B5 and why is it dropping? #4657367
02/05/18 08:32 PM
02/05/18 08:32 PM
Joined: Feb 2016
Posts: 96
NM
tempnexus Offline OP
tempnexus  Offline OP

Joined: Feb 2016
Posts: 96
NM
What exactly is the A5/B5 and why is being discontinued or dropping out of all the future formulations?! I thought the higher the number the better the oil but I guess not.

Re: What exactly is the A5/B5 and why is it dropping? [Re: tempnexus] #4657372
02/05/18 08:35 PM
02/05/18 08:35 PM
Joined: Oct 2002
Posts: 37,042
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline

Joined: Oct 2002
Posts: 37,042
Great Lakes
It's ACEA A1/B1 that was discontinued.

And no, the higher the number does not mean better. Just like dexos2 is not better than dexos1. They are just different specs.

https://www.oilspecifications.org/articles/acea-good-bye-a1-b1-welcome-c5.php


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (PUP 0W-40 SRT)
Re: What exactly is the A5/B5 and why is it dropping? [Re: tempnexus] #4657394
02/05/18 09:00 PM
02/05/18 09:00 PM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline

Joined: Sep 2012
Posts: 2,221
London, England
Also I dont remember seeing an oil that was just A1/B1 for years they usually always meet A5/B5.


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: What exactly is the A5/B5 and why is it dropping? [Re: tempnexus] #4657395
02/05/18 09:02 PM
02/05/18 09:02 PM
Joined: Dec 2011
Posts: 5,651
North Carolina
rooflessVW Offline
rooflessVW  Offline

Joined: Dec 2011
Posts: 5,651
North Carolina
The only oil I know offhand that meets A5/B5 is Pennzoil Platinum 5W-30.

I've decided it's probably easier and most likely better long term to just use an A3/B4.


"Zed's dead baby, Zed's dead."
Re: What exactly is the A5/B5 and why is it dropping? [Re: bigjl] #4657409
02/05/18 09:23 PM
02/05/18 09:23 PM
Joined: Mar 2008
Posts: 7,896
USA
slacktide_bitog Offline
slacktide_bitog  Offline

Joined: Mar 2008
Posts: 7,896
USA
The reason they no longer meet A5/B5 is because they can't pass a new test added to the ACEA 2016 sequence, but that new test is done on a diesel engine and really only relevant to diesels.

Castrol promised a revised formula that would meet the new A5/B5-16, but it doesn't seem to have been released.

Valvoline tries to use a disclaimer that their synthetic 5w30 meets A5/B5 for gasoline engines only, but ACEA does not allow this. If it doesn't meet the standards for both gas *and* diesel engines, it doesn't meet them at all!

Originally Posted By: bigjl
Also I dont remember seeing an oil that was just A1/B1 for years they usually always meet A5/B5.


0w20 and 5w20 synthetics were A1/B1 but not A5/B5 because A5/B5 requires HTHS of at least 2.9,m whereas A1/B1 allowed an exception for __w20 where the HTHS could be 2.6

and as QP said, ACEA recently dropped A1/B1.

Re: What exactly is the A5/B5 and why is it dropping? [Re: rooflessVW] #4657432
02/05/18 10:10 PM
02/05/18 10:10 PM
Joined: Jun 2015
Posts: 418
montreal ,canada
madeej11 Offline
madeej11  Offline

Joined: Jun 2015
Posts: 418
montreal ,canada
Looks like all 3 tiers of Amsoil 5w30 pcmo's claim or rather recommended A5/B5

Re: What exactly is the A5/B5 and why is it dropping? [Re: bigjl] #4657539
02/06/18 12:52 AM
02/06/18 12:52 AM
Joined: Dec 2009
Posts: 26,867
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline

Joined: Dec 2009
Posts: 26,867
Regina, Saskatchewan, Canada
Originally Posted By: bigjl
Also I dont remember seeing an oil that was just A1/B1 for years they usually always meet A5/B5.

There were/are some in North America, but both those are somewhat uncommon.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: What exactly is the A5/B5 and why is it dropping? [Re: Garak] #4657583
02/06/18 05:55 AM
02/06/18 05:55 AM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline

Joined: Sep 2012
Posts: 2,221
London, England
Originally Posted By: Garak
Originally Posted By: bigjl
Also I dont remember seeing an oil that was just A1/B1 for years they usually always meet A5/B5.

There were/are some in North America, but both those are somewhat uncommon.


The last A1/B1 only oil i saw was a Semi Synthetic and that was years ago now.

Its the spec that Fords used to specify in the UK before they introduced the Ford Specific spec


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: What exactly is the A5/B5 and why is it dropping? [Re: tempnexus] #4657763
02/06/18 10:27 AM
02/06/18 10:27 AM
Joined: Oct 2015
Posts: 2,930
Balearic Islands , Spain
FordCapriDriver Online content
FordCapriDriver  Online Content

Joined: Oct 2015
Posts: 2,930
Balearic Islands , Spain
Both A1/B1 and A5/B5 are fuel economy oriented specifications, from what i understand A5/B5 is basically the spec that replaces A1/B1.


1975 Ford Capri II Ghia 3000 V6, - Shell Helix HX3 20W-50 w/ 20% Rimula R4X 15W-40 HDEO.
1988 Ford Escort XR3i Cabrio, - Shell Rimula R4X 15W-40, w/ 30% Helix 3 20W-50.


Re: What exactly is the A5/B5 and why is it dropping? [Re: bigjl] #4658509
02/06/18 10:53 PM
02/06/18 10:53 PM
Joined: Dec 2009
Posts: 26,867
Regina, Saskatchewan, Canada
Garak Offline
Garak  Offline

Joined: Dec 2009
Posts: 26,867
Regina, Saskatchewan, Canada
Originally Posted By: bigjl
The last A1/B1 only oil i saw was a Semi Synthetic and that was years ago now.

Our M1 products had just that for a while, not to mention any 20 grades that wouldn't normally get A5/B5 by reason of HTHS in the first place. Of course, as A5/B5-2016 was coming down the pipe, a M1 and Castrol got rid of A5/B5 and Valvoline was doing their A5/B5 but for gasoline engines only business. wink


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: What exactly is the A5/B5 and why is it dropping? [Re: tempnexus] #4658697
02/07/18 07:11 AM
02/07/18 07:11 AM
Joined: Jun 2012
Posts: 1,176
Australia
supercity Offline
supercity  Offline

Joined: Jun 2012
Posts: 1,176
Australia
Lots of euro 20 grades are A1/B1. They'll soon be C5 rated.

There are not many manufacturers that ask for A5/B5 in their gasoline enginess

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