Destruction Manual ? LOL Most pple do not and I have seen warranties voided because of it.
When I had my shop some years back, we were at a training seminar and one of the Instructors got up and asked for the oil change interval for a specialized piece of equipment. Everyone that answered was wrong.
He held the manual in the air opened up and pointed to a page saying, "On page XX, it says every..."
Although they can't void a warranty for lack of maintenance, the idea was that people were griping about premature wear and having to buy a new engine when most of them were 2 times OEM Recommended interval with petroleum oil on an engine that didn't have an oil filter.
Read Your Manual. Not having one is no excuse.. Go Buy One. The average Owners Manual is written at a 6th Grade Level. That is why most of have a hard time understanding them... LOL
Bob S.