I've always thought it's kind of funny getting oil endorsements from racers. At first glance you think "wow, they clearly use the best". You then realize that their engines are designed to last 500 miles before replacing them with a new engine for the next big race.

I'm aware that vetterben said "not a debate please" but I have to react to that blanket statement. Isn't that a contradiction? Evidentally, diesel engine oil suits Jeffrey. Is there some scientific reason why oil for a diesel engine won't work in a gasoline engine? Most diesel engine oils actually exceed the lubricity requirements for gas engines.

Diesel oil is formulated to deal with different combustion by products. However most modern diesel oil meet some gas engine standards too so that's a moot point.

Steve

i just wanted to know what oil had zddp in it thats all. this is why i dont like oil threads who cares .

A good Porsche engine builder, a guy who makes Porsche cylinders, and a guy who does CNC cylinder head work on Porsches got together and tested most of the currently available herd of oils that car guys are using. They found that Brad Penn has the highest zinc content of all the popularly used oils. Brad Penn is a shortening of the name Bradford Pennsylvania where the old Castrol GT refinery was located. I guess when the refinery was going to shut down it was bought out and is being operated by the old employee and management group.

Testing second in this group for zinc content was Royal Purple and Swepco Synthetic.

The old school synthetics could cause oil leaks but now days the synthetics contain additives to swell seals so that is uncommon. I use Brad Penn in my 914, Swepco in my 911, and Brad Penn in my Z... The 911 has very low mileage and runs considerably cooler on the Swepco synthetic.

Why is Porsche test data relevant? These are all older flat tappet engines.

For the heck of it: AMSOIL Synthetic 10W-40 and 20W-50 Premium Protection Motor Oils are high-viscosity oils engineered to protect against metal-to-metal contact. They resist viscosity shear and are formulated with a heavy treatment of zinc and other anti-wear additives. They are recommended for air- and liquid-cooled, large or small gasoline and diesel engines, transmissions and chaincase applications where 10W-40 or 20W-50 oils are required with any of the following specifications:

• API SL/CF, CI-4 Plus

• API SJ, SH, SG…

• ISO-L-EMA

• JASO MA (Motorcycle)

• Cummins 20071/20072/20076/20077

They provide the extra anti-wear protection required by engines with flat-tappet cams and high-tension valve springs. I use Amsoil synthetic in my Duramax and the wifes Outback. I have a case of the 20-50 to go in the two Z's at next oil change.

Just my $.02 worth.

Interesting article here: http://www.svmgcc.org/tech_tips/oil_is_killing.htm

!!! I am a member of the Sacramento Valley MG Club. I haven't owned one in years and naturally when I did it only ran for about 30 miles over a period of 2 years but once you join their club they keep sending you the newsletter for life.

Some of the recommendations are outdated. I think EOS is NLA for one...

For ZDDP protection on my rebuilt engine, I am usuing a product called "Cam Shield".

Bonzi Lon

I haven't owned one in years and naturally when I did it only ran for about 30 miles over a period of 2 years

I had a friend who had a TR3 in high school and I only EVER saw it in the shop!!

Cool looking car though.

A good Porsche engine builder, a guy who makes Porsche cylinders, and a guy who does CNC cylinder head work on Porsches got together and tested most of the currently available herd of oils that car guys are using. They found that Brad Penn has the highest zinc content of all the popularly used oils. Brad Penn is a shortening of the name Bradford Pennsylvania where the old Castrol GT refinery was located. I guess when the refinery was going to shut down it was bought out and is being operated by the old employee and management group.

Testing second in this group for zinc content was Royal Purple and Swepco Synthetic.

The old school synthetics could cause oil leaks but now days the synthetics contain additives to swell seals so that is uncommon. I use Brad Penn in my 914, Swepco in my 911, and Brad Penn in my Z... The 911 has very low mileage and runs considerably cooler on the Swepco synthetic.

Why is Porsche test data relevant? These are all older flat tappet engines.

My friend that owns a shop and used to work for a Porsche shop where they used Swepco exclusively in their race cars. Do you have a good source for it? I assume it's local but I found it at Paragon products. I always heard it was really pricey but it doesn't seem any worse per quart than other synthetics.

http://www.paragon-products.com/product_p/sw306.htm