[Rocky Rotella]

Wow.

I'm glad I bought a case of the good EOS from GM when I did!

[P@blo]

Originally Posted by Rocky Rotella

Wow.

I'm glad I bought a case of the good EOS from GM when I did!

Was that case of the good stuff bought in the 80s?

[Schurkey]

Originally Posted by P@blo

Sorry Schurkey I did not watch the videos.

The HDEO I run is the Supertech 15W40 CK-4

There are multiple points you're missing.

1. A proper oil for the application does not need "additives".

2. "Zinc" or ZDDP is offset by the oil's detergent additives. So again, all the hobbyists focus on the "zinc" and have no concern or knowledge about detergent.

3. There are other high-pressure oil additives besides ZDDP. ZDDP is popular because it's cheaper.

4. Excess ZDDP increases engine wear.

5. Some chemicals added to oil--either at the packaging plant or by the consumer after the packaged oil has been poured-in, contribute to detonation. I guess this is especially critical for direct-injection engines, and of course our Pontiacs are not direct-injection.

6. Heavy-duty ("Diesel") oils even if dual-rated for spark ignition engines still have a poor additive package for the demands of spark-ignition engines. They really are designed to work in the "Diesel" environment.


Buy the RIGHT oil, leave the additional additives on the shelf.

[cmoc-bob]

Direct injection engines suffered from "LSPI" - Low Speed Pre-Ignition.

Caused by the additive packages used, this has been fix.

Which is why it's critical to use the correct spec oil in late-model cars.

For the folks that insist "mixing up" your own oil, you need to read and understand the mess you are doing.

Send some un-used new "whatever brand" oil to oil analysis, then send them you mixed up concoction - see what the reports show.

Yes - buy the right oil and leave it alone.....I couldn't agree more.

No race oil on the street, mixing up crap, listening to the "oil additive" sales gimmicks.

Bob

[P@blo]

You guys really crack me up. Direct port injection is about the only scenario where you can get low-speed preignition and does not apply here. So why even use it as an example, let alone repeat it? A room full of soapboxes and clapping.

The HDEO I use has the API SN rating for use in gasoline engines. Cams and tappets, is there something I am missing here? Also, since I know what the new oil and additive contains, why would I pay someone to have it analyzed? I'd put some scratch on seeing what was going on with the oil after the piss gets beat out of it for a while though.

A guy can read three different papers from the same lubricant company, and they will contradict themselves more than once. Engineers. The guys that formulate the stuff. Imagine that.

Prior to the Red Line I added the EOS and no shark bites so far. Might have to market these anti-shark attack rings just yet...

[Formulajones]

Originally Posted by P@blo

The HDEO I use has the API SN rating for use in gasoline engines. Cams and tappets, is there something I am missing here? Also, since I know what the new oil and additive contains, why would I pay someone to have it analyzed? I'd put some scratch on seeing what was going on with the oil after the piss gets beat out of it for a while though....

That's the whole point of having it analyzed. You run it for a while and send in a sample. You don't have to take anyone's word here, or what an oil company says. Blackstone will tell you exactly what that oil is doing in your engine so you can make the necessary adjustments. Just because your concoction has all the sn ratings doesn't mean it's doing a wonderful job in your particular engine.
That's why I say, unless everyone is sending in samples to show how well some oil is doing in an engine this whole discussion is honestly meaningless.

[cmoc-bob]

and as soon as you "mix up" anything, the base additive package is toast.

Go ahead, send in your base SN oil, mix in whatever you want, run it and send the used oil for analysis.

Might surprise you.