Mobil-1 5W-30 does not meet SM/SL standards?

[jambo101]

Now for the interesting part...

According to a letter Valvoline marketers received, the result from Valvoline's testing indicate:

Valvoline SynPower's 5W-30 wear performance is at least four times better than Mobil 1 5W-30
Mobil 1 5W-30 does not meet minimum API SM or ILSAC GF-4 specification because of its inferior performance in the Sequence IVA wear test

Not sure i'd hang Mobil1 out to dry on the strength of 1 anonomous letter,probably from one of Mobil's competitors,probably Valvoline.

[TheSilkySmooth]

Originally Posted by jambo101

Not sure i'd hang Mobil1 out to dry on the strength of 1 anonomous letter,probably from one of Mobil's competitors,probably Valvoline.

They (Valvoline) have issued multiple official letters clearly stating that sampling of the 5W-30 M1 does not meet SL or SM minimum standards and is not appropriate for use in current motor vehicles under warranty. I'll look for letter ... . I am not taking any sides here - I've gotten rotten batches of oil from Valvoline AND Mobil. Could have be a EOM Management decision to release underperforming material - happens all the time in even the most stringent arenas ( medical, aerospace, communications tech, auto tech). Look at the Columbia disaster for an prime example of Management incompetence or carelessness

[TheSilkySmooth]

open letter from valvoline: