Mobil 1 High Mileage 10w30 no longer API SL?

[dlundblad]

I must be living under a rock. When did Mobil 1 High Mileage 10w30 (and 10w40) lose the API SL approval? Both used to be ACEA A3/B3 rated too.

I wonder if the formulation changed or if they just changed the bottle and list of approvals.

 

[dadto2]

What's the API service category for that oil now? Isn't it backwards compatible anyway?

 

[drtyler]

Neither have been A3/B4 for several years.

 

[dlundblad]

What's the API service category for that oil now? Isn't it backwards compatible anyway?

10w30 is SQ resource conserving according to the PDS. It can’t be A3/B3 without being API SL just like Castrol 5w30 Euro.

 

[OVERKILL]

10w30 is SQ resource conserving according to the PDS. It can’t be A3/B3 without being API SL just like Castrol 5w30 Euro.

It can be SM, SN, SP or SQ and still be A3/B3, it just likely wouldn't pass the fuel economy requirements for GF-7 with the higher HTHS.

 

[BMWTurboDzl]

I must be living under a rock. When did Mobil 1 High Mileage 10w30 (and 10w40) lose the API SL approval? Both used to be ACEA A3/B3 rated too.

I wonder if the formulation changed or if they just changed the bottle and list of approvals.

Phosphorus and Zinc are at 800/870 respectively so it's in the ACEA Cx category. The 40 grade will have a HTHS of no less than 3.5cP.

It makes sense if you think about it. You wouldn't want to reduce the life of a catalytic converter on a high mileage oil burner.