SonexBuilders.net

Guys,

The documentation that came with my engine instructs me to use 20w50 racing oil. Aeroconversions AeroVee manual says to use "Brad-Penn Penn-Grade 1 Racing 20w50". What I get when I google "Brad-Penn Penn-Grade 1 Racing 20w50" is "Penn Grade 1 SAE 20W50 Synthetic Blend Performance Engine Oil".

Ref. https://www.speedwaymotors.com/Penn-Grade-1-SAE-20W50-Synthetic-Blend-Performance-Engine-Oil-12-Qt-,136581.html?sku=6332050&utm_medium=CSEGoogle&utm_source=CSE&utm_campaign=CSEGOOGLE&gclid=CjwKCAjw1rnqBRAAEiwAr29II9yoPcUi4iOTOWiFzuRHoLqLP4cwUPjGXXaU2YFc4MIRDzUzoq8KohoCoecQAvD_BwE

Is this the right stuff?

Thanks,

Wes

WesRagle wrote:Guys,

The documentation that came with my engine instructs me to use 20w50 racing oil. Aeroconversions AeroVee manual says to use "Brad-Penn Penn-Grade 1 Racing 20w50". What I get when I google "Brad-Penn Penn-Grade 1 Racing 20w50" is "Penn Grade 1 SAE 20W50 Synthetic Blend Performance Engine Oil".

Ref. https://www.speedwaymotors.com/Penn-Grade-1-SAE-20W50-Synthetic-Blend-Performance-Engine-Oil-12-Qt-,136581.html?sku=6332050&utm_medium=CSEGoogle&utm_source=CSE&utm_campaign=CSEGOOGLE&gclid=CjwKCAjw1rnqBRAAEiwAr29II9yoPcUi4iOTOWiFzuRHoLqLP4cwUPjGXXaU2YFc4MIRDzUzoq8KohoCoecQAvD_BwE

Is this the right stuff?

Thanks,

Wes

I believe it is, I recently ordered a box from the same place I always get mine and was surprised the bottles now look like this. I think they just changed the look.
It is still “the original green oil” :-)

That's the stuff. New packaging design.

Thanks guys. That is what I'll get.

Wes

OK Guys;

Explain this to me - from the latest AeroVee manual:

"Synthetic oils are incompatible with 100LL fuel and must not be used."

I'm not trying to start anything here - just wanting the get the right information.
Has anyone inquired w/the Sonex people.

Thanks, R. Stauffer

rdsafe wrote:Explain this to me - from the latest AeroVee manual:

"Synthetic oils are incompatible with 100LL fuel and must not be used."

I'm not sure if that was a quote from an older manual version, but the latest guidance is to not use FULLY-synthetic oils.

Here's a snip from the Aerovee Turbo SB published in 2016:

"new service bulletin ACV-SB-091616-2 states that Full-Synthetic oils may no longer be used in any AeroVee Engine due to incompatibilities with leaded aviation fuel and Full-Synthetic oils. Specifically, Valvoline VR-1, 20w50 synthetic and Mobil 1, 15W-50, are no longer approved. Semi-synthetic oils with high zinc and phosphorus content should be used. "

Just google it and decide for yourself.


On a side note.. all the testing I have done with oils... the fully synthetic ones seem to run notably hotter Cht's... I switched back to semi synthetic.

rdsafe wrote:OK Guys;

Explain this to me - from the latest AeroVee manual:

"Synthetic oils are incompatible with 100LL fuel and must not be used."

Many years ago - Mobil paid out to repair a lot of engines that were ruined in 50 hours or less using their fully synthetic aviation oil which cannot absprb the lead.

The problem hasn't gone away.

A semi oil has at least some mineral oil to carry away the lead. An all mineral nase is the better bet again.

1) The factory recommends a specific oil for a reason.

2) As a homebuilder it’s best to educate yourself on these topics, not just rely on hearsay from people who have an unknown amount of experience with the subject or your particular aircraft/engine/etc.

Here’s s good article on oil from Mike Busch, a respected A&P who writes articles, and gives free webinars and Oshkosh seminars for EAA & AOPA:
https://www.savvyaviation.com/wp-conten ... ut-oil.pdf

—Noel
Sonex #1339

As per Kerry just the other day. Aero vee non turbo. Valvoline vr-1 20w-50 non synthetic

Brad Penn grade 1 racing 20w 50