A5/B5 + A3/B3 in one oil?

[OilyBits]

Re: Vauxhall Combo (Fiat based) 1.3cdti diesel engine

According to the specs of Mobil 1 fully synthetic(5L) 5w30 ESP oil, it meets specification
ACEA C2/C3, ACEA A3/B3, ACEA A3/B4; API CF
ACEA A5/B5; API SL/SM
VW 504 00/507 00; MB-Approval 229.31/229.51; BMW Longlife 04; Peugeot Citroën Automobiles E/D

BUT According to the manual, Using category ACEA A1/B1 and
A5/B5 engine oil is expressly forbidden because it can cause long term damage to the engine under certain operating conditions.

I don't see how it can meet both A3/B3 and A5/B5 at the same time since these two grades have different shear strengths?

 

[Quattro Pete]

Yeah, A5 requires HT/HS to be below 3.5, so Mobil 1 ESP 5w30 cannot meet it.

Officially, they only list A3

http://www.mobiloil.com/USA-English/MotorOil/Oils/Mobil_1_ESP_Formula_5w30.aspx

But the spec sheet does in fact mention A5 too. Strange.

 

[OilyBits]

HTHS of the Mobil is 3.58, so I presume it will be suitable. I guess Vauxhall advise against the A5/B5 oils because of the lower HTHS rating.

 

[H25B]

Sorry

HT/HS?

 

[Quattro Pete]

Originally Posted By: H25B
Sorry

HT/HS?


https://bobistheoilguy.com/forums/threads/what-is-hths.90798/

 

[H25B]

Awesome, thanks!

 

[caioferrari]

It's strange that some Opel Engines are used in America but the Oil spec is A1.

In Europe, A1/A5 cause long term damage. In America, its ok.
lol