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Originally Posted by Fullsize455
Right, because you know you don't have an argument. You're not arguing based on facts or established science, you just came up with something that sounds right to you and think it's an argument. Trouble is, gut feelings and reality are not always one and the same.
Prolonged high RPM operation results in much higher oil temperature, and motor oil breaks down exponentially faster with heat. No, of course the oil does not know the engine RPM, it is simply affected by the conditions under which it is used. High RPM and frequent heavy throttle break down oil much faster than regular street driving at lower RPM. This is the kind of common sense that you don't have to be a scientist to understand.
Even those with even the most basic understanding of the differences between oils know that synthetic oil has far superior ability to deal with heat, thus it is almost universally better at dealing with higher performance engines than a typical conventional oil. Since we're talking about stuff like Rotella and Delo, we're talking about conventional oils here. Yes, there absolutely are differences between different oils' ability to handle higher RPM operation. If you think otherwise just because you think oil isn't a tachometer, I can't help you.
If you want facts, you do research and read information from as many sources as possible. If you want to be stubborn and never learn anything new, you come up with something that sounds good in your own head and you stick to it regardless what anyone else says and whether or not it's true. Fact is, the science involved with motor oils is widely studied, widely understood and available for anyone who desires knowledge to persue and understand, most people just don't care, because they think they already know all there is to know. That's why every thread about oil always devolves into these dumb arguments and disagreements, where endless myths are spewed, misinformation runs rampant, and in the end nobody is any better off than they were before we started. Most people are just too stubborn to bother learning anything new, especially when their daddy told them something different 40 years ago, and we all know daddy was always right!
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not sure what youre trying to prove here... that is a LOT of words for what i think is you trying to defend diesel oil not being capable of high rpm use. also a LOT of assumptions that i dont have a basic understanding of oils or that synthetics are better than conventional"...
as for facts & doing research, please, do some research & show me anywhere that says diesel oil has a problem with "high rpms". plenty of racers & street guys that run up to 6000 rpms using diesel oils for decades! actually why dont you call shell or mobil or valvoline tech line & ask. all major oil companies offer a diesel oil.
& im fully aware oil heat is an issue from high rpms, ALL the diesel oils we are talking about will withstand the same amount of heat as standard car oils. rotella & every company have a synthetic version of their diesel oils too. again, they are all made from the same base stock as standard car oils, handles the same amount of heat or rpm. yes, some oils are better than others but in general you cant just say all diesel oils can't handle high rpms or heat. & most diesel engines are turbos, which create tons of heat!
also diesel oils are called heavy duty engine oils, they aren't just for diesels. they can be used on any heavy duty application, gas or deisel, they are just a little more robust than a standard off the shelf car oil which is why hot rodders & racers like them.
so untill you or anyone else making these claims shows me otherwise, yes i do have an argument that diesel oils can handle the same rpms or heat as a normal car oil. synthetic or conventionsal.