Detergent and non-detergent oils do not do the same thing in an engine. The benefits of detergents in gasoline engines have been shown by repeated tests under arduous conditions for close to a century. No benefit is gained by using non-detergent oil except in special circumstances like air compressors and some hydraulic systems. My local auto parts store sells quarts of non-detergent oil at the same price as detergent oil, so no money is saved by skipping the detergent. If anything, detergent oil can be easily purchased in bulk at a discount--actually saving money. Engines using non-detergent oils also require more frequent oil changes--driving costs up further.
The sludge build-up in Mopars (usually Dodge Intrepids, but also others) was caused by poor crankcase ventilation and other design problems. It ultimately went to arbitration, and Chrysler ended up paying restitution. Had non-detergent oil been used in the same engines, the problems would have been even worse.
I've posted a link to a technical description of the various additives and what they do in modern oils.
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Today's Featured Article - Bad Vibes - by Curtis Von Fange. One of the strangest ways to communicate with our tractor is to ask it how it feels. "Ask it how it feels," you say? Yup, ask it how it feels. Now, as with the other articles in this series one has to be able to hear what 'ole blue' is trying to say in response. The nice thing about our old iron friends is that they are usually quite consistent in their response, rather unlike some people I know who might change what they say due to the weather or other mitigating circumstances. But since t
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