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I purchased a new riding mower this year. I went through the manual/specs etc. and found my engine has "break-in" oil. I haven't bought a small engine product for years and didn't know about this.
Anyway, I used my mower for about 5 hours and changed the oil per Briggs engine manual.
Holy moly! What is in the engine, as shipped, is nothing like normal oil. It's very low viscosity and was grayish/blue.
The oil from the factory is supposed to create more friction so it sets the piston/rings/cylinder for long term use and better compression.
I must say I'm glad I drained the original oil and fill with good 30 weight.
I wonder how many people ignore the 5 hour oil change and run the "thin" oil and wonder why things went wrong?
Just an observation if you're curious about new small engine equipment.
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