synthetic oil comparison

[Motion Camaro]

<font color="blue">I have always used Kendall 40 wt. Race oil in my engines, never had any oiling problems, but since Kendall sold out &amp; changed their product, I don't know what I will use anymore ...

Here's an oil story for you:

I just sold a customer rebuild parts for a Ford 302 he put in a '63 Comet.
I gave him a Comp. Cams Hyd. Cam &amp; lifter kit with an MSD distributor.
The break in seamed to go well until about 5 hours later.
The engine stoped running ... ... checked fuel, O.K., checked spark, N/G. Pulled the cap off &amp; the rotor was not spinning. Pulled the dist. out &amp; the gear was worn like it had 150,000 miles on it. The cam had 5 worn lobes &amp; 2 lifters were almost worn through!
I called Comp. Cams &amp; went over everything, they sent me a new cam &amp; lifter kit &amp; told me to use the new Poly Gear.
(side note: the original stuff that came out of the engine with 65,000 miles on it looked fine.)
The custome said he had 60lbs of oil pressure during break-in &amp; about 15lbs at idle, seems typical Ford to me.
Put in all the new parts, rechecked everything ... 8 hours later, a valve tap ... ... Cam &amp; lifters worn out, one good note, that poly dist. gear still looked new.
Engine is out &amp; back apart now.

looking on the Comp. Cams website one night trying to see if there is a situation with their product I came across a bulletin about breaking in your new engine with ... ROTELLA ... hmm, no one mentioned this to me on the phone, well we will search for another problem first &amp; then try this oil. </font>

click here --&gt; ROTELLA bulletin

[Chevy454]

[ QUOTE ]
Rob Clary, what are you running in the Yenko?

[/ QUOTE ]
Castrol Syntec, 10w/30

[Tim Penton]

Thanks for your post fellas. Craig, that bobistheoilguy.com site is great!! Everyone here should check it out.

[tirebird]

This subject has been hashed over on every muscle car/sports car board for years with most of the comments being anecdotal and very few citing SAE or other scientific evidence to back up their opinions. So what's the truth? Is synthetic better than dino oil and, if so, which brand is best? The only way to find out is to use double blind research and test each brand in the laboratory or in automobiles for extended periods of time where neither the testor or the testee knows which oil is being used. The results are there. I don't belong to the SAE so I can't download the scientific data but there is a good comparison test by Amsoil on it's website which shows the comparative performance of many of the popular brands of oils. It's good reading.

http://www.amsoil.com/products/atm_t...dex_flash.aspx

[Chevy454]

Being as Amsoil did the testing and it's posted by Amsoil, a person *might* want to take that article with a grain of salt...for us old car guys, it's mainly gonna come down to zinc &amp; moly content, moreso than who's oil pours the best at the lowest temperature...

[NCGuy68]

As I've mentioned before, go to www.bobistheoilguy.com Lots of good info there.

[tirebird]

[ QUOTE ]
Being as Amsoil did the testing and it's posted by Amsoil, a person *might* want to take that article with a grain of salt...for us old car guys, it's mainly gonna come down to zinc &amp; moly content, moreso than who's oil pours the best at the lowest temperature...

[/ QUOTE ]

I'm not so sure that Amsoil did the testing but they sure paid for the testing. What I find interesting about the results is that their biggest competitor, the one they're always comparing their product too, Mobil 1, came out so well. I'm told by my engineering friends that the truly independent SAE tests basically mirror Amsoil's results.

Either way, I, like you, because I own a car with a flat tappet cam, want all the ZDDP I can get. That's why I use Mobil 1's 15w-50, which has the old formula of zinc and phophorus.

[GRB]

Wouldn't diesel syn contain even more anti-wear agents? That's why I am interested in it for a new engine that is not a crate or OE engine.

[Chevy454]

Last I heard diesel oils were taking the hit as well...and while we're on the subject, you'd better stock up on some of the older diesel fuel supplements because low sulphur diesel is here to stay...I think I'm gonna buy stock in an injector/pump reman business...