if most engine wear accurse at engine start up when oil pressure is nil why do care manufactures install pre oil systems in passenger cars. there are after market items in the racing industry I believe . is this a case of planed obsolescence?
I'm sorry what is your question?... You say that most engine wear occurs at start-up when oil pressure is low, and then why car manufactures DO NOT pre-install these systems into passenger cars?
If this is your question, first off there are applications besides the racing industry, heavy duty diesel trucks for example. Fleet vehicles or otherwise might opt in as well. The reason they are not widely installed on all passenger cars is cause almost everyone agrees that 200k miles is like the alright to get a new car that is if it wasn't crashed to hell before that. And in american throwaway society, it's pretty much unnecessary for THAT much of long term cause then the engine would then in theory outlast the car. Race cars use pre-oilers cause then tend to sit for a while then run heavily, then sit again, providing that "extra wear" in truth if you drive your car daily and give it plenty of maintenance it will last for a good long while as you also will in this instance for example take care of all common issues for the specified vehicle. Therefore unnecessary cost to manufacture for one. But also no monetary gain I can only assume. If you were to install one in your car there is also a negligible benefit that I've seen at least. I've seen a honda with over 300k miles without this system in place or my ma's old toyota with 200k before it was crashed. TLDR: cost is not justified for non-heavy duty applications and pretty much not yet much verified info to provide benefits at least to the advertised double the engine life. Therefore since the avg for long life is 200k for most cars before multiple tailer points what's the point of keeping an engine with over 400k miles when practically everything else will wear before then.
Instead of a pre-oiler it seems owners are expected to spend time and money keeping a quality lubricant in the motors that protects parts for short periods of time by simply coating them until the next time the normal oil system pressure is used.
Sometimes being too technical is a waste of time and money. Should a sweet-little-old-lady that only goes to church on Sunday and the supermarket on Thursday? Most vehicles do not get the abuse that requires the expense of a special pump that will need replaced soon. But more do need a quality lubricant, that is changed regularly before wearing out, that all owners can easily change or be done cheaply at local garages.
