Quote:
Originally Posted by bigblockchev
I work for a large hospital as a maintenance supervisor I have under my purview 6.5 MW of diesel generators for which I am responsible for the maintenance. I actually do oil analysis on a regular basis for these units. The cost of oil analysis is in the neighborhood of $25 a pop , when you are looking at engines that have a 200L oil capacity each then it makes sense to spend a few bucks to determine the condition. I use Shell rotella 15-40 in my Benz and other vehicles. The cost of the oil is slightly more than the cost of the testing. So yes I will continue to change my oil at 3000 Mi intervals. I do believe in the science of oil analysis but the economy is just not that conclusive. Cheers Dan
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Big Trucking Companies like Ryder were using Oil Analysis before this extended Oil Change idea became popular.
They were doing it to detect Bearing failures and Coolant leaks (most often from the Oil Coolers) so they could catch them before the very expensive Engines were destroyed. It is an accepted cost of doing business that has proven save money for the reasons stated alone.
The Extend Oil Drain idea had to be proved and it has been.
For commercial purposes it means that they buy less Oil and Filters, have to despose of less oil and used Oil Filters (the. do not get the free Oil dump at the local Autozone they have to pay), they have less records to keep concerning where they got rid of the old Oil and Filters, and it saves the labor charge of doing unecessary Oil changes and the vehicle stays on the road making money insted of in the shop havening an Oil Change.
So for us common folks with free labor, free old oil and filter disopsal, no waste disposel records to keep track of for the EPA and the cost of the Oil Analysis compared to just changing the Oil makes good sense.