Which Engine Oil

[celticbiker]

I don't wish to cause an argument here and everything you say makes perfect sense,but I think it only right that the other side of the argument be heard.

While I agree that oil is oil is oil and if it lubricates a cheap one is just as good as an expensive one, I think that this only goes so far and depends on the application.

If you're talking about a 1980's Cortina them why would you out 60 quids worth of castrol edge in it when 20 quids worth of gtx will do the job.

There is no benefit in putting modern high tech oil in an engine that was designed to run on 20 year old oil technology.

While you might not think it, oil these days are designed at a molecular level and it's not always about lubricity but often about longevity.

Modern bike engines have much tighter tolerances and smaller oil ways, this puts a much higher sheer force on the oil and causes it to break down and thicken much quicker than an older engine would.

As an example, if you put gtx in a modern bike it might lubricate just as well as a bike specific oil but after 3000 miles it might have broken down enough to increase the amount of time it takes to get to the cams, this is clearly not ideal.

When I find it, I'll post a video of a practical test on different oils demonstrating the principal.

From a personal point of view I have taken my last for bikes well in excess of 100000 miles on bike specific oil and at valve clearance time the dealer has always said that the cams look like new.


Edit.

Here's the link

https://www.youtube.com/shared?ci=EiXYFvWbdrg

This post was last modified: 26-11-2016, 04:47 PM by celticbiker.