What is the best Oil to use in a Rotary Engine?

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TOOL
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Re: What is the best Oil to use in a Rotary Engine?

Post by TOOL » Tue Oct 20, 2015 2:50 am

Gewdraa wrote:If your not going to us the omp why would you need to stay on a mineral oil?
In theory, you don't need to if not using OMP.

But, if that's what the motor had in it and what the bearings are used to, why change it?

People worry too much about oil in motors imo.
Back in sunny France

Gewdraa
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Re: What is the best Oil to use in a Rotary Engine?

Post by Gewdraa » Tue Oct 20, 2015 7:55 am

Interesting, there are many benifits in using a synthetic oil, low viscosity, helps engine cranking, additives etc, longerlife of oil,
Here is an interesting faq
http://www.royalpurpleconsumer.com/reso ... ry-engine/
Anyway I shall keep searching for information

Gewdraa
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Re: What is the best Oil to use in a Rotary Engine?

Post by Gewdraa » Tue Oct 20, 2015 9:21 am

If anybody is interested here is a nice oil comparison tool, its free,
Really shows the advances in oil over the years.

https://www.lubrizol.com/EngineOilAddit ... fault.html

the valvoline race oil specs are as follows
SAE 20W-50
API SL
ACEA A3/B4
Ford M2C-153E
GM 6094M

so any acea A3/B4 meets these specs,


spoddy
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Re: What is the best Oil to use in a Rotary Engine?

Post by spoddy » Tue Oct 20, 2015 4:35 pm

apexheid wrote:
spoddy wrote:Mazda always recommended castrol oil.
rx8's comment don't count here. :D
Oh I know they don't so didn't mention the 5w30 magnatech I use. Just re-irrerating what Tool and few others have said that Mazda recommended castrol engine oils and for their diff oils etc. I have heard of royal purple in the states being used.

Gewdraa
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Re: What is the best Oil to use in a Rotary Engine?

Post by Gewdraa » Tue Oct 20, 2015 5:25 pm

Seing as we dont now the history of engine we are going to install, I shall recommend mineral oil, but if this was a new build I would be putting synthetic in it,
Points noted about seals and carbon deposits.
We have three engines, the best compresson one is going In

Gewdraa
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Joined: Tue Oct 13, 2015 5:19 pm

Re: What is the best Oil to use in a Rotary Engine?

Post by Gewdraa » Wed Oct 21, 2015 9:35 am

interesting site about oil specification
http://www.carbibles.com/engineoil_bible.html

Castrol recommends Magnatec 10W-40 A3/B4
;)

TOOL
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Re: What is the best Oil to use in a Rotary Engine?

Post by TOOL » Wed Oct 21, 2015 12:09 pm

Peanut oil ;s;
Back in sunny France

hoodedreeper
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Re: What is the best Oil to use in a Rotary Engine?

Post by hoodedreeper » Mon Jan 25, 2016 6:18 pm

Just read through this topic and i'm still indecisive to which oil to use.

As far as i'm aware the car still has the OMP,so do i go with 10w30 mineral,20w50 mineral or Castrol 15w40 semi?

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A7RXY
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Re: What is the best Oil to use in a Rotary Engine?

Post by A7RXY » Mon Jan 25, 2016 7:46 pm

I've used Castrol Magnatec 10W40 or its predecessor for the last 30 years in mine and it's still running ok.

Dibs

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