Engine Oil

Rotary Engine Chat......Got A Problem With Your Rotary Engine.... Need Help...?
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myatt1972
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Re: Engine Oil

Post by myatt1972 » Mon Apr 24, 2017 10:15 pm

MelloYello wrote:it is oil - just chuck it in
s(c)
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TOOL
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Re: Engine Oil

Post by TOOL » Tue Apr 25, 2017 5:38 am

10W40 or 15W40 that meets A3/B4 spec. Cheap and change it often.

PS semi synth is mineral oil with a dash of synth in it.

PPS put the old stuff in the fuel tank for premix.
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gt_james
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Re: Engine Oil

Post by gt_james » Tue Apr 25, 2017 8:40 am

OK, I'll use 10W40 then. I will stick to Castrol power 1 2 stroke for premix though haha.

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spirit r
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Re: Engine Oil

Post by spirit r » Tue Apr 25, 2017 9:13 am

TOOL wrote: Cheap and change it often.
The best i ever read about rotary oil. BTW i always change oil filter and drain the air cooled oilcooler too. Rotary oil must cool the engine from the inside and my 12A experience is mineral oil transporting heat better. Change interval is shorter then synthetic oil interval.

Rotary 1
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Re: Engine Oil

Post by Rotary 1 » Tue Feb 19, 2019 4:20 am

MelloYello wrote:
Mon Apr 24, 2017 9:13 pm
it is oil - just chuck it in
I’ve heard using synthetic wasn’t good in a Rotary. True or false? I’ve always used Pennzoil 10w30 & 5w30 that’s what the shop used & told me to use after they installed a new 13B. I’ve also never mixed with my gas either. It’s been 10-15 years since the work was done & 5 - 10,miles a year at the most. Is using this oil bad?? I live in AZ

codge
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Re: Engine Oil

Post by codge » Tue Feb 19, 2019 11:11 am

Cldblded Rotary 1 wrote:
Tue Feb 19, 2019 4:20 am
MelloYello wrote:
Mon Apr 24, 2017 9:13 pm
it is oil - just chuck it in
I’ve heard using synthetic wasn’t good in a Rotary. True or false? I’ve always used Pennzoil 10w30 & 5w30 that’s what the shop used & told me to use after they installed a new 13B. I’ve also never mixed with my gas either. It’s been 10-15 years since the work was done & 5 - 10,miles a year at the most. Is using this oil bad?? I live in AZ
I would only use straight mineral oil as the original spec. The Pennzoil sounds right.
Premix is worth thinking about as an original engine could have an inbuilt oil metering pump that's now approaching 40 years old.

KiwiDave
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Re: Engine Oil

Post by KiwiDave » Tue Feb 19, 2019 6:07 pm

GTX is still a mineral oil base, just with a small amount of synthetic blended in to help with viscosity and temperature control.

Many of us have used GTX for decades and decades. And you can still find it on Ebay.
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Rotary 1
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Re: Engine Oil

Post by Rotary 1 » Tue Feb 19, 2019 8:09 pm

codge wrote:
Tue Feb 19, 2019 11:11 am
Cldblded Rotary 1 wrote:
Tue Feb 19, 2019 4:20 am
MelloYello wrote:
Mon Apr 24, 2017 9:13 pm
it is oil - just chuck it in
I’ve heard using synthetic wasn’t good in a Rotary. True or false? I’ve always used Pennzoil 10w30 & 5w30 that’s what the shop used & told me to use after they installed a new 13B. I’ve also never mixed with my gas either. It’s been 10-15 years since the work was done & 5 - 10,miles a year at the most. Is using this oil bad?? I live in AZ
I would only use straight mineral oil as the original spec. The Pennzoil sounds right.
Premix is worth thinking about as an original engine could have an inbuilt oil metering pump that's now approaching 40 years old.
Since this is new to me i take it the metering pump is internal? I remember seeing on my invoice that was replaced or rebuilt. I’ll have to look now at my invoice. If not should I be premixing?

codge
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Re: Engine Oil

Post by codge » Tue Feb 19, 2019 8:42 pm

The oil pump is on the front corner of the engine, external, that's on the 12A. Presume 13B is the same.
I just think premixing is belt & braces. I haven't noticed any excess smoke from it.

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gt_james
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Re: Engine Oil

Post by gt_james » Wed Feb 20, 2019 9:18 pm

thought I would add that since I created this thread I have done some more research and I use fully synthetic in my 13B engine which has OMP removed. I used total Racing quartz 10w50. I also use it in my 12A with omp still intact, many people say modern synthetic is no problem in rotary engines.

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