engine lubrication engineers (off the record) the very same: “Would you recommend using aftermarket engine oil fortifiers?
Have any studies or research been done on the benefits of using these types of oil additives?” Here is what they recommend as an effective response to the sales
representative who market these products or devices. Tis response could also apply for oil additives oil life/lubrication improvers: As school bus product buyers, we are often asked to try devices
or additives that modify the structure of fuel or improve lubri- cation for combustion engines. Tey are always either magnetic devices or petroleum based additives. Te claims are the same; extended oil changes, improved fuel economy and emissions based on testimonials. We should always keep our eyes open to new ideas so you could respond as follows. Te supplier should have an emis- sions test run on a modern electronically controlled diesel engine on a certified test cell running the EPA Federal transient test cycle. If the fuel economy and emissions improve, as they have stated, we will look at the device. An additionally important question to also ask before consid- ering using an engine oil fortifier or fuel system additive should
include, “Why don’t school bus engine manufacturers lubrication engineers recommend their usage. Where are all their official studies and who is conducting them? Have they complied with ASTM (American Society for Testing and Materials) requirements for specific engine lubrication protection?” Remember, there is a lot of chemistry occurring in most of the oils that are used to lubricate today’s modern diesel engines. As we approach another milestone in engine design and lubricating oil technology, we need to be aware that they are complicated mix- tures that are in balance with one another and need to be respect- ed. Engine Manufacturers Lubrication Engineers will always tell you that mixing of different oils and adding additional additives should be avoided. ●
Pudlewski is STN’s technical editor and a 40- plus year veteran of the school bus industry. He is the retired vice president of fleet operations, procurement and maintenance for Laidlaw and is a member of the National School Transportation Association Hall of Fame.
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