Mobil 1 15w50 vs Valvoline Premium Blue 15w40

[Skier]

just wondered are these 2 oils pretty comparable ? I know one is a dino oil. Will be using in high load situations.

 

[ShotGun429]

They are very equal with great results here at the Speed Shop, a sight edge to Valvoline after looking at many teardowns with high loading.

 

[SilverFusion2010]

One is a PCMO and one is a HDEO. Don't know much about either oil otherwise. High RPM might favor the M1 but that's just speculation

 

[4WD]

Maybe MolaKule or SonofJoe could note something on anti foam from a oil category perspective … I know NMMA gets little respect from this crowd but do test for high RPM foaming … An outboard mechanic wrote in on a blog where he ran a twin engine boat for an hour WOT … the test was with PCMO in one and FCW in one … claims to have pulled a “corn dog” dipstick on the road oil and pure oil on the marine grade … Don’t see why HDEO has more focus on RPM than PCMO or marine ? Please advise …

 

[SilverFusion2010]

Typically diesels don't wind out to 6k rpm. They make their torque down low. So I'm theorizing that the PCMO has more anti foaming agent than the HDEO. Again... speculation.

 

[Ramblejam]

Few notes... NMMA FC-W has same requirements on ASTM D892 as API SN: Sequence I, ml initial/ml after settling: 10 / 0 Sequence II, ml initial/ml after settling: 50 / 0 Sequence III, ml initial/ml after settling: 10 / 0 NMMA FC-W has lower requirements on ASTM D6082 as API SN: Sequence IV, ml initial/ml after settling for 1 minute: 200 / 50 (NMMA) Sequence IV, ml initial/ml after settling for 1 minute: 100 / 0 (API) API CK-4 has higher requirements on ASTM D892 as API SN: Sequence I, ml initial/ml after settling: 10 / 0 Sequence II, ml initial/ml after settling: 20 / 0 Sequence III, ml initial/ml after settling: 10 / 0 API CK-4 also has to meet COAT requirements:

 

[Skier]

thank you. Some of this is a little over my head - but the Premium Blue is showing CK-4 and SN - so it seems I should be good with that.