Recommendations for Racing Oil - Type, Weight

[sopwith21]

Hi everyone;

Running an L28 in a Z car (1980 engine block, I believe) for road racing.

Any recommendations for type/weight of oil? I don't know what the previous owner ran in the car.

I'm considering going to Valvoline 20w/50, but I'd like your thoughts first. I'm also considering adding zinc if I can find it on the aftermarket. I believe the earlier cars preferred zinc and heavier oil weights.

I know oil debates are largely opinion based, but still, your opinions are welcomed. Thanks!

[gnosez]

20-50W Brad Penn Green oil (has extra zinc)

In our 2.8L vintage 240 race car running 13:1 compression ratio and in my 3.2L stoker 240 street car running 11.5:1 cr

Oil analysis after every change.

[sopwith21]

Very helpful. Many thanks!

[TomoHawk]

I getthe ZDDP Zinc additive at NAPA

[Bonzi Lon]

My zinc of choice is http://www.cam-shield.com/

Bonzi Lon

[Jeff G 78]

I like Valvoline VR-1 which also has high ZDDP. I get it at Napa. I run my Z for 24+ hours straight on the track in ChumpCar and I've have no oil related issues at all. I run straight 40 weight if the ambient temps are reasonable.

[clarkspeed]

Something with zinc! I run Redline 40w synthetic. The Brad Penn is good also.

[steve91tt]

I also use VR1 and change it every 10 hours of track time.

[steve91tt]

You might also consider running a low oil pressure alarm on the track. I use one of these...

http://www.longacreracing.com/catalog/item.asp?id=785&catid=11

I substituted an 85dB siren for the light. If the oil pressure drops below 20psi on the track the alarm will sound. If I don't turn on my Accusump while on the track I get an alarm at every braking zone and hard corner. The alarm is the best $25 insurance policy I have ever purchased.

https://www.cantonracingproducts.com/product/24-026/24-026----ACCUSUMP-2QT-NO-VALVE/

If you are going to road race an L6 I would think about an upgraded baffled pan or an Accusump. If you don't already have one. Just my $0.02.

[Mike W]

Brad Penn.

# 1 rated oil by Isky Cams.

Mike.

[Arne]

Brad Penn is one of the most popular oils in the air-cooled Porsche world. I like that it is available in more viscosities than many of the other high ZDDP oils.

[sopwith21]

Once the filter fills up, does it have a 6 quart capacity?