Originally Posted By: another Todd
Originally Posted By: Jim Allen
Originally Posted By: Quattro Pete
Been posted here several times in the past.
The relevance to real life conditions of the test he uses is somewhat questionable.
Agreed. The next post after that from 63Mako sums up a big part of what I think:
'How do you develop the sacrificial layer that ZDDP builds up with extreme pressure and heat over an extended period of time in a 30 second test? You are doing a film strength test and in post after post claiming it is a test of antiwear additives. There is no way the ZDDP can be activated and generate the sacrificial layer needed to protect flat tappet cam and lifter surfaces in a 30 second test so you are not testing antiwear additives. If you are as intelligent as you think you should answer the question posted.
Jim, first off wouldn't an oil that has film strength immediately out of the bottle be of any benefit? Why should I buy an oil that needs to go through heat and extreme pressure before it begins to protect when I can buy an oil that protects immediately?
Second, you claim that in post after post I claim it is a test of antiweatr additives. Wrong. I usually don't post on antiiwear additives because I don't know enough about them. Please show me these post after posts that you claim are mine.
Third, you state that "If you are as intelligent as you think you should answer the question posted", Um, HELLO, I was the OP, there was no question here. In a different thread (where I also posted this link) I stated what I would do. But, everybodys opinions here are just that, and often there is disagreement, sometimes it is knowledgable individuals correcting the misinformed, sometimes it is blowhards just mouthing off. I generally think when it's blowhards they tend to attack others (like your post) rather that just provide their input.
Chill, Todd. That wasn't me talking about you. Did you notice the quotation marks around that section? If you go back to the post you linked to on the Corvette forum, you will see I was quoting the post right after it by a member THERE, '63Mako, who had a comment that summed up my first impressions of the info. May preamble sentence to it, I thought, makes it clear I was quoting.
To answer your question first question, film strength before activation is of some use but I wouldn't use that as any primary basis for making a judgement on oil.