Are u one of those owners who....

[shadrach74]

I replace things in vehicles the same way the aviation industry does. Which is to say that most of it is done "on condition". Infant mortality of parts is something to consider, so is maintenance induced failure. A proven piece of equipment that is functioning properly is a known quantity...A new part and installation is an unknown quantity. That being said, there are "life limited" parts on any vehicle: Timing belt/chain/tensioner, spark plugs, filters, fluids, etc...

[mrjr1000]

Routine maintenance is just that. It's routine (common and expected) so I do it. Enjoy doing it by the way... Neighbors think the car breaks down every other week because they see it on the jack stands. Not so!

Worn out parts, well, replace them when they are worn out. Faulty parts,again, have faith then replace if it's worth it. Guardian sounds good in theory!