Originally Posted By: 1JZ_E46
In general, oil film thickness and strength increases with viscosity. That's the physics I was referring to, calm down man. Also, how do you know that they recommend thicker oil because they know people buy off the shelf oil that isn't "solid"? Seems like a baseless opinion to me.
Because I only happen to work with the people who have to write those recommendations. How many people here will purchase a "boutique" oil? Few. So going to a thicker viscosity is the only way to achieve protection. Imagine if Ford on their GT350R told their customer well you could run a 30 or a 40 weight but you have to purchase Motul, RL, RLI, Ams, or another nice oil. People would probably sue, and they would counter market their own Motorcraft brand, PR/Legal/Marketing would have a nightmare. It just won't happen.
I've spoken with this extensively with VP's at Cummins. You have to make recommendations based on what 99% of the people can attain, not what's right for their machines.
Also, remember, these OEM's have BIG marketing deals with the oil companies. I'm pretty sure Exxon would have 14 injunctions by morning if they found out Toyota was recommending someone else for the LF-A and so forth.
In general, oil film thickness and strength increases with viscosity. That's the physics I was referring to, calm down man. Also, how do you know that they recommend thicker oil because they know people buy off the shelf oil that isn't "solid"? Seems like a baseless opinion to me.
Because I only happen to work with the people who have to write those recommendations. How many people here will purchase a "boutique" oil? Few. So going to a thicker viscosity is the only way to achieve protection. Imagine if Ford on their GT350R told their customer well you could run a 30 or a 40 weight but you have to purchase Motul, RL, RLI, Ams, or another nice oil. People would probably sue, and they would counter market their own Motorcraft brand, PR/Legal/Marketing would have a nightmare. It just won't happen.
I've spoken with this extensively with VP's at Cummins. You have to make recommendations based on what 99% of the people can attain, not what's right for their machines.
Also, remember, these OEM's have BIG marketing deals with the oil companies. I'm pretty sure Exxon would have 14 injunctions by morning if they found out Toyota was recommending someone else for the LF-A and so forth.