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Cox Engine of The Month
July-2024
robot797's
![](https://i.servimg.com/u/f95/15/46/86/41/3_robo10.jpg)
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
robot797's
![](https://i.servimg.com/u/f95/15/46/86/41/3_robo10.jpg)
"ULTIMITE COX 010: it has a clutch, E starter, throttle, exhaust, aluminum tank, aluminum venturi, gearbox with forward and reverse, and now its on a custom drawn and printed stand"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
Adding oil to fuel
Page 1 of 1
Adding oil to fuel
This may sound crazy , at least at first. I have some 15% nitro fuel with 18% synthetic oil. I would like to increase the amount of oil in it to about 24% let’s say. Where can I get some synthetic oil to add to it. This is to be used on a never started Wen-Mac 049 and I’ll probably also use it in my Testors small Cosmic wind. I’ll try to post pictures. It’s a Awesome brand new condition Wen -Mac P-63
Greenman38633- Gold Member
- Posts : 150
Join date : 2024-02-05
Re: Adding oil to fuel
caveat - I buy pre-mixed 1/2 A fuel from Brodak - cause they make it easy to buy.
https://brodak.com/fuel/fuel/fuel-qt-15-nitro-11-5-castor-11-5-synthetic-2.html
I prefer SIG, but they seem to be permanently out of stock
Fitz and Ritch's Brew are also good, however, seems to be "see me at a contest, or call me" I wanna click a button and be done.
IF i was mixing? I'd use same as for my 2 stroke motorcycles, this is my oil of choice
https://www.amazon.com/BLENDZALL-CYCLE-460-PT-Blendzall/dp/B000UKIMGE/
https://brodak.com/fuel/fuel/fuel-qt-15-nitro-11-5-castor-11-5-synthetic-2.html
I prefer SIG, but they seem to be permanently out of stock
Fitz and Ritch's Brew are also good, however, seems to be "see me at a contest, or call me" I wanna click a button and be done.
IF i was mixing? I'd use same as for my 2 stroke motorcycles, this is my oil of choice
https://www.amazon.com/BLENDZALL-CYCLE-460-PT-Blendzall/dp/B000UKIMGE/
cstatman- Platinum Member
Posts : 551
Join date : 2021-02-17
Age : 60
Location : San Jose, CA
Re: Adding oil to fuel
Thanks cstatman but I do not want castor in my fuel for use in a Wenmac/Testors engine That has been my understanding
Greenman38633- Gold Member
- Posts : 150
Join date : 2024-02-05
Re: Adding oil to fuel
I use a lot of synthetics, I personally would not run full synthetic in that engine. The machining and fits of that engine are pretty archaic. Castor oil is highly recommended especially if it's the first run. However, seeing that your deadset on using synthetics, I would recommend Klotz Super Techniplate. The one problem with adding more oil is that while your raising the oil content, your lowering the other contents such as nitro.
Ken Cook- Top Poster
- Posts : 5542
Join date : 2012-03-27
Location : pennsylvania
Andy Batts Two Fuel Blender .xlxs
I have the Andy Batts Two Fuel Blender. I took his one quart spreadsheet .xls and re-formulated/re-saved as an eight ounce .xlxs blender.
I tried attaching the .xlxs to this thread, but it is a restricted file type.
PM your email address...I'll email it to you. Get it while it is hot on my frontal lobe!
Admin, if you care to share from the info folder, I can email the original one quart .xls and the modified eight ounce .xlxs. PM if you wish to host it please.
Once you get it, play with it for a bit before asking questions...many apologies to Yabby. I've owed him this one since late last month and just sent it to him.
I tried attaching the .xlxs to this thread, but it is a restricted file type.
PM your email address...I'll email it to you. Get it while it is hot on my frontal lobe!
Admin, if you care to share from the info folder, I can email the original one quart .xls and the modified eight ounce .xlxs. PM if you wish to host it please.
Once you get it, play with it for a bit before asking questions...many apologies to Yabby. I've owed him this one since late last month and just sent it to him.
_________________
Never enough time to build them all...always enough time to smash them all!
944_Jim- Diamond Member
Posts : 2000
Join date : 2017-02-08
Age : 59
Location : NE MS
Re: Adding oil to fuel
All good Jim
no apologies needed. It hit my mailbox today.
![:thumbsup: 👍](https://cdn.jsdelivr.net/emojione/assets/png/1f44d.png?v=2.2.7)
![cheers](https://2img.net/i/fa/i/smiles/icon_cheers.png)
Yabby- Platinum Member
Posts : 711
Join date : 2021-06-08
Location : Yorke Peninsula South Australia
Re: Adding oil to fuel
Thoughts behind use of all synth content fuel was from Testor's Corp. To prevent permanently gumming up the Rotomatic starter with Castor. ![Huh...](/users/3015/29/34/60/smiles/3929217648.gif)
However, for our Cox engines, all synth fuel is a no-no.![Mad](https://2img.net/i/fa/i/smiles/icon_mad.gif)
![Huh...](/users/3015/29/34/60/smiles/3929217648.gif)
However, for our Cox engines, all synth fuel is a no-no.
![Mad](https://2img.net/i/fa/i/smiles/icon_mad.gif)
GallopingGhostler- Top Poster
Posts : 5432
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
Re: Adding oil to fuel
Greenman38633 wrote:This may sound crazy , at least at first. I have some 15% nitro fuel with 18% synthetic oil. I would like to increase the amount of oil in it to about 24% let’s say. Where can I get some synthetic oil to add to it. This is to be used on a never started Wen-Mac 049 and I’ll probably also use it in my Testors small Cosmic wind. I’ll try to post pictures. It’s a Awesome brand new condition Wen -Mac P-63
Hello Greenman
I would add castor oil to the fuel you have as it will help with corrosion. In a lean run the castor oil turns into varnish that protect metal parts, In a lean run synthetic oil will burn in the combustion chamber reducing lubrication. I used to use Cool power 15% all synthetic in my OS engines and they were corroding inside. I started to add castor oil to the fuel and it helped to greatly reduce corrosion. I agree with all the guys that have suggested castor oil. I used to buy castor oil from SIG but now I use Blendzall. Your WEN MAC P-63 looks really great.
Juan
F4D Phantom II- Gold Member
- Posts : 228
Join date : 2019-04-08
Re: Adding oil to fuel
Actually what I was saying about all synth fuel use on Testor Rotomatic starter engine is true. Odd recent discovery, discussed maybe a month ago. Words were in black and white in the instructions.
Defies standard wisdom, but the Rotomatic starter is very easily gummed up with Castor and can be rendered permanently unusable.
Bob has successfully freed up a number of bummed up ones, but has also had a few that could not be salvaged. Only solution to Those was leave the spring off and manually flip the prop.
These Testors don't lend themselves to disassembly, easily damaged, why Bob has developed alternative methods to free and clean them up.
It was instructions with the Testor's Fly 'Em series, I believe, but those more familiar can chime in.
Defies standard wisdom, but the Rotomatic starter is very easily gummed up with Castor and can be rendered permanently unusable.
Bob has successfully freed up a number of bummed up ones, but has also had a few that could not be salvaged. Only solution to Those was leave the spring off and manually flip the prop.
These Testors don't lend themselves to disassembly, easily damaged, why Bob has developed alternative methods to free and clean them up.
It was instructions with the Testor's Fly 'Em series, I believe, but those more familiar can chime in.
GallopingGhostler- Top Poster
Posts : 5432
Join date : 2013-07-13
Age : 70
Location : Clovis NM or NFL KC Chiefs
![-](https://2img.net/i/empty.gif)
» adding castor
» adding oil to fuels
» Laminate flooring installation-my experience
» Cleaning engines crock pot style
» Adding to my collection !!
» adding oil to fuels
» Laminate flooring installation-my experience
» Cleaning engines crock pot style
» Adding to my collection !!
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