Just came out...

http://www.amsoil.com/storefront/zrf.aspx

 

No but you can have too much zinc. It is supposed to deposit and wipe away. Too much will build up and not wipe away, robbing power.

 

What makes you think there's too much in there? I've seen several threads here with guys debating where they can get it...

 

It would be nice if Amsoil actually listed the ZDDP content by PPM. Making a blanket statement that levels 'exceed API SM and later' only gives you the minimum possible value. It's probably a great oil but there are numerous other less expensive oils with published higher ZDDP content available than API SM.

 

i've been using it and it works great. that being said they have an oil specifically for older european turbo cars but i wanted to call and ask about the zinc content. haven't done that yet. i don't think you can go wrong with amsoil.

 

was wondering about that when i saw the thread yesterday. no luck.

would like to see it as least as high as the M1 0w50 which has 1750 ppm P and 1850 ppm Zn.

 

Never heard of M1 0W50
The highest amount M1 has published (other than their race oils) is in the 1300 ppm range for their 15W50.
But their motorcycle oils are approaching the 1800 mark.

 

That's true, Amsoil should list the Zinc content on an MSDS sheet or something...

 

I change my own oil why worry about engine sludge

 

think with your dipstick, laddy.

 

Tested samples of Racing Oils:
Joe Gibbs: 1010
Mobil 1: 1850
Brad Penn: 1570
Red Line: 2230
Amsoil: 1660
Royal Purple: 1100
Torco: 1130
Valvoline: 1520

Anything over 1250-1300 is generally detrimental. Real old stuff and air cooled bikes I think need more.

 

Hmmm, I don't really believe any of that. According to that logic only Joe Gibbs, Royal Purple and Torco are 'acceptable'. What testing can you show that over 1300ppm is detrimental? Which lab are we using here? The test numbers you posted aren't right to begin with. Here are the lab results for Brad Penn for example.

Brad Penn Product Blackstone Lab

Penn Grade 1 zinc 1,214 ppm
20W-50 #7119 phos 944 ppm

Penn Grade 1 zinc 1,424 ppm
10W-30 #7150 phos 1,139 ppm

Brad Penn PCMO zinc 689 ppm
20W-50 SJ #7123* phos 522 ppm

The Amsoil lab tests for the ZRod are: 30 and 50 weight: Zinc 1440 PPM
Phos 1320 PPM

Also ZRod has detergents which make it good for the street. Here is some more info about it being tested after being used in a Mitsubishi Evo...

I ran 6.5k miles with 3 track days and it was still fine according to Blackstone Labs. I'll see how the new 20w50 will do with some hard track days and street driving. I'll do an oil analysis with 3 track days with 4k miles and see what they say. I thought 6500 miles and 3 track days was nuts. Blackstone Labs told me do 8k miles and 4 track days...lol. So for the 20w50, im gonna do 4k and 3 track days and see how it is.

 

Here's a real Blackstone test of Redline which puts the ZDDP at 1214PPM. Not sure where the 2230ppm came from.

 

their racing oil will protect turbos at cold startup better than 15w50 and yet retains 96 % of the viscosity at running temp. it has 1750 ppm P and 1850 ppm Zn. it's also been shown to be stable up to 500° F... i'm running 50/50 of 0w50 w/ 0w40 in my car.



,

 

My testing was done by an oil manufacturer whose products I will begin importing in a few weeks.. Samples were all new, out of the bottle. I will take that over a single post from an internet forum from one guy, that doesn't say anything other than Blackstone is telling him he can extend his drain intervals. Still, one of the challenges we face is that oil preference is like religion - faith and belief are often more powerful than data.