Spoolin8

iTrader: (2)

3/4oz per gallon of gas? or do you mean 4oz per tank? So any 2-stroke oil that is TCW-3 certified is fine such as marine boat oil?

BDC

3/4oz to 1oz of oil per gallon of gas, yep. Yes marine boat oil that's TCW-3 certified 2-stroke works just fine. I've used a bunch of different brands and there doesn't seem to be much substantial difference. Kind of the same paradigm that exists with measuring the qualitative difference in 4-stroke motor oils.

B

robrecht

Just using 2-cycle oil won't help against carbon deposits if that is part of your reason for premix. Also, it might be worthwhile to read this thread--it'is more specialized in that it concerns people with Sohn adapters but it also addresses some misconceptions about ashless marine oil:

https://www.rx8club.com/series-i-tech-garage-22/2-cycle-oil-use-161362/#post2746659

robrecht

Autozone does carry it nationally and on their website so you can ask for it by name. $3.29 for 16 oz. and $4.49 for 32 oz.

Spoolin8

iTrader: (2)

well i guess i will go back and ask for some marvel mystery oil lol. So will say 5oz be enough for 1 tank of gas?

robrecht

Sorry--I realize the name is an embarrassment! 5 oz should be fine, 'though I've heard of others using more, eg, I saw that one guy uses 8 oz. You might want to experiment or read up on what others are doing and why. Brian mentioned an even higher amount and he's smarter and much, much, much more experienced than me ... but I wonder if he was thinking of rotaries without a MOP (Metering Oil Pump)? You can get a sense of whether your MOP is working by keeping track of how much oil you're burning, especially when driving hard.

BDC

Compared to the use of 4-stroke factory oil metering it absolutely will help. It's still not perfect but it's far superior to the factory system. Having torn down many engines that were running premix as well as being a user of it since 1999 I've seen the differences between the two. It seems to me that 2-stroke premix only RE's last gobs longer as well as have substantially less carbon buildup on the rotors compared to factory.

Richard Sohn's adaptor: Good piece. I remember when he started making them around 1998 IIRC originally for aircraft guys. Although I'm a fan of completely removing all of the oil metering hardware (injectors, the lines in particular, and the pump), this is a good alternative. My only concern, and it's due to my ignorance on the specs of the adaptor itself, is the ratio of oil to fuel it's injecting.

B

BDC

I'm not smarter than you but yes I was referring to an either/or thing; 2-stroke premix in the tank only or the factory OMP by itself and not a combo of the two.

B

robrecht

That's good to know, thanks. Are you familiar with the use of FP+ as part of premix? My understanding (from Jax here) is that it may help to further reduce carbon build-up. It has something called cyclohexanone that will emulsify carbon into a graphite lubricant.

robrecht

I think the Sohn adapter is supposed to merely allow the factory MOP to pump the oil from a clean receptical based on the current PCM flash. (I have seen speculation that the rate of flow could still be different because of oil pressure dynamics.) Some people further modify the MOP volume and other PCM settings with a Cobb Access Port thingy.

BDC

Not familiar with it but it sounds intriguing! I'll have to check it out! Thanks.

B

robrecht

Here's a link to get you started:
https://www.rx8club.com/series-i-tech-garage-22/fp-plus-123569/

Here's where you can buy it:
http://lcdinc.zoovy.com/product/FPPL...ne_gallon.html

Or maybe you can drive over to their main office in Addison and check 'em out see if they're legit:

LCD Inc.
4402 Sunbelt Dr
Addison, TX 75001
service@lubecontrol.com
1-888-627-9410

Or maybe some day in the far distant future I'll let you tear apart my Renesis and we can both see if it does any good.

Spoolin8

iTrader: (2)

ok well i bought some from autozone after doing some more looking and i plan on using 4-5oz on my next fill up.

Thanks

GaMEChld

^bought some what? Marvel Mystery Oil?

Anyway, yeah 4-5 oz per tank is fine. I'd only go as high as 1oz/gallon ratio if you were tracking. So for DD, I'd say anywhere between 4-8 oz premix for a full tank of gas would be fine. That keeps you between 1/4 - 1/2 oz/gallon. But I also adjust for my tank not being fully empty when filling. I usually fill when I've got a quarter left so I'm putting like 5 oz per 12 gal. Anyway, being off by a bit isn't gonna be a big deal.

Spoolin8

iTrader: (2)

yea some Marvel Mystery Oil...

Nubo

I've been using MMO since this Spring, after I did the carbon-cleaning procedure, and the engine seems to like it. Or at least tolerate it. I do think the idle is smoother with it and after a few weeks seemed to rev easier too, but could easily be my imagination. Though I did stop using for a month or so recently and things seemed to slowly get rougher. So I started again.

I usually fill up when the light comes on, and use 6 oz for that volume. My OMP has always seemed to be on the "generous" side; I used to envy people that claimed to never have to add oil between fillups. As time went on I became glad that mine uses 2 or 3 quarts. But I do like the idea of insurance and getting some lube (and anti-scuff additives) to places that might be missed. Plus the thought that MMO might be dissolving any sticky/gummy deposits is appealing and hopefully it serves as a fuel-system cleaner too. And it's thin enough to where it seems that it wouldn't cause the kind of filter blockages that people have talked about.

There is one thing I've noticed, and i'm curious if any other MMO users have noticed this -- the backside of my car does seem to get dirty faster. Or maybe this is my imagination too? It's a Yellow, so doesn't take long to show grime.

Spoolin8

iTrader: (2)

mine is silver and before i starting using it i noticed it got dirty quick and i have only used MMO for one fill up so far and have seen no noticeable change to the back getting dirtier... However i definitively noticed a change in the idle and the cars idle is smoother and there is less backfire it seems, or the best way to describe it is that its quieter and the whir is more noticeable.

robrecht

This makes sense as I think about it, but what I was a little confused about is that another Renesis rebuilder here has considered even a moderate 4-oz amount of Idemitsu premix as perhaps responsible for excessive carbon build-up on rotors.

I suppose most of the carbon build-up comes from the gas or the stock MOP 4-stroke. How much more, if any at all, could be added by such a small amount of additional premix displacing gas? This is why I err on using a little more premix. Now I feel better about that.

GaMEChld

Also, if we go ahead and do a periodic engine cleaning, that probably helps a ton for carbon buildup.

GaMEChld

Did swoope ever come out with that thread explaining why Idemitsu with FP+ premixed in ready to go bottles is bad?

robrecht

nwoope..

beers

swoope

iTrader: (5)

nope,

nor did i mention that premix with idemitsu and fp+ in ready to go bottles is bad or goes bad!

it is an ends to a means!

beers

robrecht

What does that mean?

swoope

iTrader: (5)

in my observations it is better than dumping premix in the tank and filling it up. a lot better..

but i have to pull the pump and the other side, and wipe the inside of the tank down again to be sure..

this is a huge issue for those that premix, and do track days..


right now i would say dont dump and pump. if you do you will have fuel pump issues. i did and others do..

mix and fill at half tank then finish the fill, might be the answer. but right now i am running without premix. go figure..

beers

robrecht

thanks