Independent Authorized AMSOIL Dealer
John Deere S100 Oil Analysis
Owner history places the sampled oil in service for about two years, while the lab report verifies 83 operating hours on a John Deere S100 lawn tractor. The oil looked usable at sampling, but silicon should be watched.
What the lab data showed
The owner's case history places the oil in service for about two years; that calendar duration is not a lab-report field. The lab report verifies 83 hours on AMSOIL SAE 5W-30 synthetic small-engine oil. The cards below preserve that distinction and list the report values in readable page copy, with the report image included below for reference.
Use the result to reduce guessing, not to overpromise
The lab comment said flagged data did not indicate an immediate maintenance action and that the oil was suitable for continued use at sampling. It also called silicon a moderate-level item, so air filtration and future trend checks should stay part of the maintenance plan. About two years and 83 hours describe this one case; they do not establish a universal service interval.
Confirm the exact equipment recommendation
Small-engine product selection can depend on the equipment and service condition. Start with Product Guides for another mower or engine; use the specialist Small-Engine Filter Lookup only for filter matching.
Common S100 case-study questions
Read the report as one equipment example, not a blanket service interval.
Does this report set a universal two-year interval?
No. Owner history says the oil was in service for about two years, while the lab report verifies 83 hours. One mower sample does not establish a universal interval; monitor future samples, inspect air filtration and follow the shortest applicable service rule.
What was the main watch item?
Silicon was reported at 52 ppm and the lab described it as a moderate-level item. Air-filter sealing and future trend data matter more than a single number by itself.
How should visitors match products for another small engine?
Start with AMSOIL Product Guides for the application. Use the Small-Engine Filter Lookup only when a supported filter match is needed.
Optional account programs
Buying for repeat personal or business use?
Review official AMSOIL program information after you have found the products you need.