CurlyDave
Elite Member
ihookem said:Mobil isn't selling Walmart bad oil. If they did and engines started needing rebuilds Mobil would have a class action suit on their hands in a hurry. Mobil might tell them if they want our oil that cheap come and pick it up yourself, and they probably do. I can imagine how much Mobil 1 Walmart sells.
I have toured engine oil test facilities at Cummins, Cat, Mack, and some oil producers. The all have a lot of test stands where new, or freshly rebuilt, engines are run 24/7 on a dyno. After a given number of hours engines are disassembled and checked internally.
I have also visited the engineering departments of Ruan and Yellow Freight.
All of the engineers at these places tell the same story. If the oil has an API label, it meets the API specification. If it meets the API specification it will protect your engine.
The big fleet operators, and many owner operators of the big rigs have their oil analyzed and change oil when the analysis says they should. For smaller engines this is not economical, so we change by either time or mileage.
But the bottom line is that no matter what the brand, if it has an API label, it meets the API spec and it is pretty much equivalent. The main reason some oils are less expensive at retail has almost nothing to do with the quality of the raw materials, including additive packages. It is efficiencies of scale in manufacture and distribution.
The labor to mix up a million gallons of lube oil is not a whole lot more than the labor to mix up a thousand. But, if that cost is spread over the million gallons it is lower per gallon.
I actually think that you are slightly better off with oil from a large producer, such as Mobil, or even the Wally World house brand. They have deeper pockets if they are sued, and will take more care to meet the spec. They also have the resources to have an in-house laboratory to do QC.
A small custom oil blender making up a few thousand gallons at a time in an industrial park is going to rely on an outside lab, and is going to be at the mercy of his feedstock suppliers.
Now the smaller guys may have good marketing, and tell a good story, but when the major engine producers and the major fleet operators, who hire engineers to really test and analyze their operations, say that the major brands are equal or better than the small independents, I believe them.