Oil Confusion and Royal Purple
Dealer B says 5w40 any full-synthetic
Pep Boys says 0w30 or 0w40
Mechanic says 5w30 since it's gonna be Summer here in Miami
What's recommended?!?
Will I benefit from Royal Purple? I don't mind spending the few extra bucks...
Thanks,
Kenny
Stick with Mobil 1.
I work for their competitor and have some friends at some other refineries.
We do not even try to compete… it’s that good.
Not saying Royal is not good, (Is one the cleanest oils you can buy!) but here is what you are getting:
You can only have 100% oil.
If you add in additives you will only have 90% oil and 10% additive, 80-20 and so on….
Royal put in a lot of anti ware additives. Foaming agents that when heated foam and adds a layer of protection so that the crank will get of off the bearings. (Not sure what the additives are or the percentages are. Guarded secret.)
If you’re in an environment ware there is a lot of friction then Royal is your first choice.
Mercedes has a very good clean oiling system.
If you’re worried about the oil, you should do as I do… change the oil filter every 2500 miles. What you are trying to do is keep the oil Clean! Carbon gets traped in the oil from the combustion chamber Which leads to dirty oil and bearing ware.
What you are going to need is oil that has good viscosity protection.
(Viscosity is a measure of the resistance of a fluid which is being deformed by either shear stress or tensile stress. In everyday terms (and for fluids only), viscosity is "thickness". Thus, water is "thin", having a lower viscosity, while honey is "thick", having a higher viscosity. Viscosity describes a fluid's internal resistance to flow and may be thought of as a measure of fluid friction. For example, high-viscosity magma will create a tall, steep stratovolcano, because it cannot flow far before it cools, while low-viscosity lava will create a wide, shallow-sloped shield volcano. Put simply, the less viscous something is, the greater its ease of movement (fluidity).[1] All real fluids (except superfluids) have some resistance to stress, but a fluid which has no resistance to shear stress is known as an ideal fluid or inviscid fluid.
Oil weight, or viscosity, refers to how thick or thin the oil is. The temperature requirements set for oil by the Society of Automotive Engineers (SAE) is 0 degrees F (low) and 210 degrees F (high).
Oils meeting the SAE's low temperature requirements have a "W" after the viscosity rating (example: 10W), and oils that meet the high ratings have no letter (example SAE 30). Oil is rated for viscosity by heating it to a specified temperature, and then allowing it to flow out of a specifically sized hole. Its viscosity rating is determined by the length of time it takes to flow out of the hole. If it flows quickly, it gets a low rating. If it flows slowly, it gets a high rating.
Engines need oil that is thin enough for cold starts, and thick enough when the engine is hot. Since oil gets thinner when heated, and thicker when cooled, most of us use what are called multi-grade, or multi-viscosity oils. These oils meet SAE specifications for the low temperature requirements of light oil and the high temperature requirements of heavy oil.



