But where to put it?

 

Not a lot of space under a Zed bonnet.

 

http://www.autoenginelube.com/pages/903473/index.htm

Why bother?

 

Decent oil stays on the main and big end bearings if they are in good condition. There's loads of us got zeds with way over 130000miles and never needed a gadget like this.

 

As for the blurb

 

quote

 

And every time the engine is started, several hundred revolutions of the crankshaft occur before pressurized oil is present to lubricate the bearings.

 

This design flaw results in dry bearing abrasion each and every time the engine is started.

 

unquote

 

That is *****cks!

 

Maybe on a model T Ford

 

A modern engine might take 2 seconds before the oil pressure guage shows pressure or the light goes off and that might equate to 30/40 revolutions of the crankshaft - hardly several hundreds! and the oil is already on its way round the lube galleries as soon as the starter cranks it.

 

Sure the max wear does occur in the first minutes after a cold start and something like this might be a help in increasing engine life but its hardly a necessity. Some of that wear is due to cold oil and cold metal clearances. Sure you might also hear hydraulic tappets rattle for a second or two but that is harmless.

 

Another "design fault" of this gadget is that it holds onto the engine oil pressure at switch off - that would be hot idle oil oil pressure which is usually about 25psi at best. Hardly going to be surging round a dryish engine when the oil is also cold when it is again switched on.

 

If this prelube thing was really a worry to engine designers they would have designed in an electric oil pump for prelubing before start up alternatively letting the starter turn the engine a few revs before ignition on.

 

Sorry to rant just mho. Yet another gadget without a real need for it.

 

I would spend it on good oil and petrol and just enjoy!

 

Suppose it goes faulty and leaks away pressure?

 

"If it aint broke dont fix it!"

Originally posted by WillieO

Why bother?

 

Decent oil stays on the main and big end bearings if they are in good condition. There's loads of us got zeds with way over 130000miles and never needed a gadget like this.

 

 

 

"If it aint broke dont fix it!"

 

I think it is

If it aint broke, take it apart and find out why not. ;)

My engine has over 165,000 miles and never used anything like that.