Classic Car Motor Oil

[tartan18]

Hopefully this will not re-ignite the debate about what oil is best in our cars but has anyone used this product? It has the requisite zinc additive, it is the right multi-weight and it is not that expensive ($4.96 a quart) if the prices on the web site are still accurate.



From what I have read on their web site this oil sounds like it would be a good way to go with our cars.

http://www.classiccarmotoroil.com/index.html

[So Cal Mark]

if it has some zinc it's probably just fine

[bobplyler]

In their FAQ's is this
"Virtually any car that does not have a catalytic converter would benefit. CCMO may shorten the life of the converter by coating the active substrate with phosphorus:"

[tartan18]

As I understand the chemistry (and I didn't do too well with that subject in college ) the additive in oil that adversely impacts a catalytic converter is zinc. But having zinc in the oil is important for our cars because of the flat tappet design. I have been using Rotella (Shell) but I note that Classic Car Motor Oil (CCMO) has 1,600 ppm zinc while the older blend of Rotella had 1,200 ppm. Shell no longer discloses how much zinc is in their products but the rumor (Internet buzz) is that they have cut back on zinc to conform to new EPA requirements. I also found that Valvoline VR1 (Racing Oil) in both conventional and synthetic has zinc but that is more expensive than CCMO.

Just wondering ....

[baltobernie]

I use this, which appears to be similar to what you've found:
http://www.mossmotors.com/Shop/ViewProd ... exID=65895

Many "experts" no longer recommend diesel oil for vintage cars. Diesels now have catalysts, too. Their combustion process results in huge amounts of particulates vs. gasoline engines, so diesel oils have much higher detergent levels. More additives = less lubrication base stock.

Frankly however, you can probably use anything in a Fiat TC; they are very robust engines. It's probably more important to use a good filter!
http://www.dcfiats.org/tech/filter-B.pdf