Nubo

Yep, opinions and experiences. A conclusive engineering analysis is pretty much beyond the scope of an individual owner, or even a rebuilder. I think you'd need the kind of R&D budget that only a car manufacturer has, for that.

Safe and beneficial are two different standards.

And again it boils down to opinions. I read what was out there, considered the experience level of the posters, and read some of the older-school information on RX7club.com as well. From all indications I could see, premixing doesn't appear harmful. Or, at least, I haven't come across any complaints that premix messed up an engine. So imho, as long as you stick with one of the generally accepted premixes and ratios, the issue of safety is fairly well assured.

As far as benefit, that's a little harder to assess. But, given the experience of longtime owners, racing teams and engine rebuilders I tend to believe it. Mazda has made several changes along the way that indicate that there was insufficient apex seal lubrication, at least with version 1 of the RX-8. These include multiple revisions to the PCM to increase oiling in various situations, and a redesign of the oil injection system in 2009.

If there was a "final answer", this thread wouldn't have run to 90 pages.

plain ole wanker

^+1 Well said

robrecht

Babelfish Translation:

"There is nothing wrong with incorrect or missing punctation on the Intertubes as long as you are typing in a really long and confusing way."

Somehow I knew all those many years studying ancient languages would come in handy some day.

jmc23200

I use MMO because it is readily available to me. Some use Amsoil Saber Pro and/or Interceptor. Others use Protek R or Idemitsu, which are specifically designed for rotaries. TBH, any high quality, low ash, low flash point, synthetic premix should work fine. Or at least be better than nothing at all.

jmc23200

Now that I read what I wrote, is MMO any of those other than a low flash point and maybe low ash? I think I just talked myself out of using MMO.

Chad D.

iTrader: (19)

it doesn't have to be synthetic. There are some very good dyno/hybrid 2 cycles out there.
I bought some mmo, thought about it and spared my 8 and put it in my brothers saturn.

ASH8

I wish people would stop comparing MMO to Amsoil Saber Pro, because there is NO comparison.

One is a cheap "Mystery" product, the other is a High End 2 STROKE OIL with a VERY HIGH FLASH POINT.

Does anyone even know the flash point of MMO???..

THE POINT OF PRE-MIX IS YOU WANT THIS OIL TO LUBRICATE NOT INSTANTLY BURN OFF BECAUSE IT HAS A LOW FLASH/BURN RATE.

ASH8

BTW, as you can see the Amsoil Interceptor for Marine- Snowmobile use has a lower flash point because these engines do not get as hot.

robrecht

Ash, I'm curious why you don't use Idemitsu? Not that this is the most important point, but if flashpoint is important to you, Idemitsu does have a slightly higher flashpoint than ASP. Do you know what type of cleaning agents are in ASP? Since Idemitsu was designed for use in rotaries prior to the Renesis' carbon collecting side exhaust ports, I like the idea of even adding an additional cleaning component to my premix (hence my use of FP+ with Idemitsu). That's also the appeal that MMO has for some people.

BTW, I have also heard some people mention some advantages of a lower flashpoint in a miscible premix, but I won't pretend to defend their views. Some of what people have said on both sides of this point seem to make sense as far as I understand the issues.

ganseg

iTrader: (5)

I just noticed Interceptor says it is a 50:1 oil and Saber Pro says it is a 100:1 oil. What does that mean? If I try Interceptor, do i need to use twice as much?

FoxRacer600RR

i tried to read threw alllllll the pages on here but couldnt find anything on castor 927, i hear all these good things about getting better gas millage but when i premixed i notices a drop in gas millage BUT better idle and rev

btw im using 10oz per FULL fill up, ....basically im wondering if i should use more or less when using a castor based oil compared to petroleum

also (and i skiped a few pages simply because there is wayyy to many lol) what about FI setup and premixing ?

ASH8

Don't use ANY CASTOR OILS...Period!

Then Read this PDF....
https://www.rx8club.com/attachment.p...3&d=1213419067

FoxRacer600RR

and why is that, because if you look at petroleum under a microscope it looks like BAD lol this is from some research i have done.....plus from my MX days those were the best oils to use

ASH8

I said to read the link...did you...NO..

Castor base oils do not mix with petroleum Fuels very well and they will Gunk/Carbon/Soot Up your Rotary engine very quickly...

Plus stuff up your injectors and Fuel pump...

READ IT...

FoxRacer600RR

so i wonder why they are rated best to use with 2 cycle engines?

ASH8

I give up...

FoxRacer600RR

****edit*** incorrect post from rx7 forum lol

FoxRacer600RR

no im curious.....i found the post above in a rx7 forum

TeamRX8

iTrader: (25)

many of the people over there don't know half as much as they think they do ...

FoxRacer600RR

haha.....il take ur word for it, it seems like the only thing bad about castor oil is the deposits left behind then....everything else seems better. now does that also mean that if the engine is ran hard that castor oil is ok due to the fact that it will "run it out" rather than have it build up in the combustion chambers ?

TeamRX8

iTrader: (25)

it doesn't offer any advantage over a good pre-mix oil like Amsoil Saber Professional, but has numerous disadvantages

it''s clear that you don't care about any of that though, you'll fit in fine on the RX7 forum

ganseg

iTrader: (5)

Excellent article! Thanks for bringing it to my attention!

SpIcEz

Its not, it was used in the early 70's.

Leaving deposits behind is BAAD. WAY BAD.

Half the conversation in the gazillion page thread is about cleaners in detergents to get RID of the little bit of deposits that are left behind. Going to castor oils would increase that problem tremendously.

As the article mentioned, unless your ready to do an engine teardown OFTEN, dont use castor oils. Simple.

Oh... and you cant run your engine HARD ENOUGH to make it "run out". If racing engines that use it have to be tore down, it means it doesnt "run out".

nycgps

iTrader: (1)

wow ... ok

I now announce the Monthly Moron Award goes to ...... *dooooooooooooonn...... *

FoxRacer600RR !!!!!

Come on guys give him a round of applause !!

jmc23200

FoxRacer600RR.... really? really? I mean REALLY? There is a 90 page thread explaining all of this. If you even read the last couple of pages you would know the general does and don'ts. You sir have just boarded the