Manufacturers do need to cover themselves.
An example from the bike world.
Customer changes the engine oil and filter on a year old 600, but uses a none OE filter which has the wrong flow rate. . .top end of the engine lunched.
Handbook clearly states use OE part, but customer decies to save a few bob.
This manufacturer always uses discretion, but there have to be limits.

Bud

__________
2003 - 4/4


Bud
4/4 "Stanley"