larpy

I have read older posts but nothing real recent. I have been pondering the idea of using Amsoil in my 993 but wanted input from those that have had experience with it. Any pros or cons over Mobile 1? The stuff looks like it is the only true 100% synthetic on the market.

boulderbobo

Hmmmm...

Stealth 993

Been running it since getting the 993's. Works fine.
There are a couple of other high quality fill synth out there, like Redline.

matt777

I ran the 20W50 Racing Oil (ARO OR AMO?) one season and I know of one independent Porsche shop in Phoenix that uses it. I'm sure its fine. All you can go on is the specs.

Bearclaw

No. There are dozens of true synthethics. But Amsoil has been around longer than most. I've used Amsoil in most of my water-cooled cars for a long time. But I use Redline in the Porsche. The issue for air-cooled's is the amount of ZDDP (Zinc Dialkyl-Dithio-Phosphate) in the formulation for wear, which has pretty much been eliminated in most oils. Most of the guys who rebuild these engines for a living and have posted here seem to think it's important. I know Redline has it because I've talked to them. A lot of guys use Brad-Penn for that reason, but I prefer to use a full synthetic. Some categories of Mobil 1 seem to be okay in the ZDDP content, some are not. What the content is of the various grades of Amsoil seems to be hard to come by. Would you ever run into a problem running Amsoil in your engine? I doubt it.

larpy

Thanks for the input. The cost of Amsoil is pretty high and a bit diffcicult to find at the drop of a hat compared to Mobil 1 etc.

Stealth 993

Amsoil is on a whole other level them M1. It is a superior oil.
If you go to their web page, you can buy it, & see all the levels of everything in the oil.

Bearclaw

I see numbers like TBN on their site, but I've never seen zinc/phosphorus levels stated there, unless I'm missing something. However, curiously I did find it on a distributor's website. As with Mobil 1, it looks like like you're good if you get the right type, because they show high zinc and phosphorus for certain 'models' of Amsoil.

See the chart at the bottom of the page, pretty good explanation there too:
http://www.syntheticwarehouse.com/am..._high_zinc.htm

As far as cost, if you buy one of their "preferred memberships" for a nominal fee, it brings the cost down within reason vs. M1, considering the quality difference (IMO). Shipping is from regional warehouses, I get mine in 2 days generally.

As far as brand preference goes, if you start getting into that this thread will go for seven or eight pages.

amfp

Amsol transmission oil is an excellent product. No experience with their motor oil products.

Mark in Baltimore

I considered Amsoil but decided to use Redline 10W-40 in all of my cars.

Nurburger

Bearclaw is right... Amsoil for water - Redline for air...

The ZDDP's are key & the reason I use Amsoil in my modified 951.