John Deere S100

I did the John Deere S100 oil change and filter shortly after purchasing on March 2023. I did not save the hours when I changed it but the oil in the report was added soon after I got the lawn mower. The engine had 83 hours when I drained it.

AMSOIL states the 100% Synthetic Small-Engine Oil service life of up to 200 hours or one year. Based on that and this report I will probably let it go 100 hours, regardless of age, which will probably be three years. Check the dip stick level occasionally and oil level was always the same. I will try to find a better air filter for the silicon.

The report is using AMSOIL 5W-30 100% Synthetic Small-Engine Oil and a EA15K53-EA oil filter. S100 oil capacity 1.5 qt.

Replaced with AMSOIL 10W‑30 small‑engine oil and a AMSOIL Oil Filter EA15K53-EA. 5w or 10w is fine, but 10w is recommended.

I also add AMSOIL Quickshot® Gasoline Treatment and Stabilizer with regular 10% ethanol gas. The maintenance dose is (gallons X 0.66 fl. oz). The clean-up dose is double. I add the clean-up dose at start of the season directly in the 2.4 gallon gas tank which is 4 oz or 1/2 cup measure of Quickshot, slight overdose is fine. For the rest of the season I use the maintenance dose added to the 2.5 gallon gas can at 2 oz or 1/4 cup measure of Quickshot.