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Originally Posted by Brandon
lol not the Rice JDM, the guys that are famous for making power with the 5.4L mod motors, and 4.6L 's too.
JDM builds performance parts.
The wave I'm talking about has mainly to do with bearings....as the parts spins there is a "wave" of oil being pushed in the direction the part is moving, behind the part, there is less oil because it's been pushed forward, so the theory is that a thinner oil will take less force to move and less time to fill back in behind the part thereby making more power and protecting better. The reason they suggest Synthetic is because a thin oil tends to break down in high heat conditions, sythetic holds up better to heat.
That's basically what I was told and not in those exact words, but it seemed to make sense to me when I was told....I'll see if I can dig up a discussion about it.
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Ahhh, dunno about those JDM guys. To me, JDM means rice.
The wave theory holds no weight. What you're explaining would actually rob you of power, and add to the premature wear of your bearings. If you paint a mental picture, you would assume that the oil level surrounds the crank and rods. When the rods and crank weights spin, they slap back into the oil causing the oil to splash around but this does not affect lubrication. Think about a dry sump pan, all the oil is contained in an area so as not to let the crank and rods splash around in the oil. This helps in two ways: First you gain power by not having resistance to the rotating mass, and second, the oil does not have a "whipping" effect created which causes air bubbles which in turn cause cavitation.
The reason you dont have to worry about lubrication is because the oil pump is picking up the oil and pumping it to the lifters, valvetrain, camshaft, rods, and crankshaft. Thicker oil is more resistant to cavitation, which I mentioned above. Cavitation is when small air bubbles are sucked into the oil pump, which then explode inside the pump causing harmonic distortion (you should understand this well, being a car audio guy) which causes both premature oil pump wear and gaps in the oil delivery...... which will ruin bearings prematurely. Also, oil pump failure can be devastating to the internals.
Synthetic oil does hold up better, as it is engineered to stand up to higher temperatures while maintaining high levels of protection. Also, it is engineered to continue at a high rate of viscosity for a longer period of time.
Hope this helps.
SS
