I used Valvoline VR1 racing oil for a while because it was advertised has having a high zinc content. I switch to Mobil 1 V-Twin after Tracy made a comment that he had been using it. I believe both oils have a high zinc content.

Bobby

Thanks Bobby.
What factors influenced your choice of oil?
I had wondered if the thermal properties varied much between oils.

Steve


> On 3 Nov 2020, at 6:17 am, Bobby Hughes BHughes@qnsinc.net <flyrotary@lancaironline.net> wrote:
>
> Steve,
>
> It was a Paul L oil pan with integrated rear mount. So may be 6-7” deep. The super charger was likely causing most of the vapor/oil I would find in the sceet tubing. Venting at the center iron may not the best location. I settled on 20-50W V-Twin synthetic motorcycle oil. No indication of foaming and I always made oil.
>
> Bobby
>
>
> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
> Sent: Monday, November 02, 2020 3:55 PM
> To: Rotary motors in aircraft
> Subject: [FlyRotary] Re: Sump Breather?
>
> Hi Bobby.
>
> Are you using the renesis oil pan?
> I seem to remember the renesis had a plastic manifold that I thought in combination with the pan worked to reduce foaming and oil loss out of the sump.
> I thought the use of synthetic oil may also play a roll in reducing the oil loss via a breather.
>
> Was there a good deal of gasses escaping through that vent Bobby?
> I take it the boost pressure might exaserbate the problem.
>
> I’m concerned that at times I’m seeing a small oil level drop between flights were previously the level grew as a result of the oil added to the fuel ending up in the sump.
> With only a small 3/16 vent that shows no sign of oil exiting I hadn’t given it any thought till now, but pondering this oil usage.
> Ive seen no signs of oil seal leakage.
>
> Cheers
>
> Steve
>
>
>
>
>
> > On 2 Nov 2020, at 10:19 pm, Bobby Hughes BHughes@qnsinc.net <flyrotary@lancaironline.net> wrote:
> >
> > sceet tube
>
>
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