100:1 mix recommendation

pecheux · Sep 27, 2006

Hi y'awl

I have read many post recommending newcomers NOT to use a 100:1 mix in outboards. Now most oils nowadays shows the possibility of mixing at 100:1

I can understand that oil that was originaly made for 50:1 mix motors should not be used at 100:1 mix in those same engines.

But my question is ... are all those NO NO 100:1 mix concern these regular oils ? or does it also include Amsoil type oil (or others) that were originaly designed to be used at 100:1 as per their saying to be used in engine that would normaly require a 50:1 mix with regular 2 cycle oil.

I know this subject was on the table in the past ... but this one stands out differently.

Tx

BillP · Sep 27, 2006

Re: 100:1 mix recommendation

My 2 cents...
If corrosion doesn't kill it, your motor will wear as long with "50:1" oil mixed at 100:1 as the advertised 100:1 oil does. It doesn't really matter what ratio the oil mfg's glossy ads say. Use all oils at the exact ratio your motor mfg says. They are much smarter about their motors lasting a long time than we are.

tashasdaddy · Sep 27, 2006

Re: 100:1 mix recommendation

they are tcw 3. thats what you are suppose to use. OMC, Johnny- Rude, said 100 / 1 then resended that to 50 / 1. they other stuff is for weed whackers.

steelespike · Sep 27, 2006

Re: 100:1 mix recommendation

With a 100:1 mix there is no cushion if you miss mix or
if a carb runs lean or the motor starts to run hot.
I accidently ran 100:1 for 1/2 a summer (dummy) no problem until my son had a ski weekend. Cost me $800
for a piston,rings and a rebore.I keep the bill posted where I keep my oil.

rodbolt · Sep 27, 2006

Re: 100:1 mix recommendation

for smaller motors below 50 HP 100/1 seems to work, as long as EVERY engine subsystem works as engineered with no degradation and the owners manual for storage over 30 days is FOLLOWED TO THE LETTER.
neither of these happen. mix at 50/1 and all are happy longer.
your talking about the difference in a 1% solution of gas and oil to a 2% solution.
so far this past 7 days I have replaced 1 Z300 and one Z200 powerhead, got 3 more Z200 head's to go.
all were caused by customer neglect and 1 is actually going to be covered by warrenty.
tropical storm Ernesto was good to me

yea baby

pecheux · Sep 27, 2006

Re: 100:1 mix recommendation

Steelespike: obviously a 100:1 is so borderlined that anything above 150% perfect condition will kill it huh ?

Like watersking .... lol

Tx that says it all.

kenmyfam · Sep 27, 2006

Re: 100:1 mix recommendation

Personally although I have a VRO at present I have always stuck to the manufacturers recommendation for oil ratio and so far so good.

Silvertip · Sep 28, 2006

Re: 100:1 mix recommendation

One must interpret statements such as this one very carefully -- "may be used at ratios up to 100:1". That statement may be true for lots of oils. Unfortunately, very few engines are built to run on a 100:1 ratio. You must use the ratio specified for the engine.

LubeDude · Sep 28, 2006

Re: 100:1 mix recommendation

Although I`m a loyal amsoil fan, i don`t recommend the 100:1 outboard oil at 100:1. I have used it that way in the past with no problems though. I then finished out my experience witht the 100:1 oil at about 85:1 with great success on an early 85 HP Evenrude that spent it`s remaining life as I know it running like a scared rabbit.

I have mentioned before, that the 100:1 oil has no solvents in it thus why it`s not recommended as an injector oil. Therefore you are actually running a richer oil ratio than you think you are. Not 50:1 though. I`m running the HP Injector oil now in my 1987 150 Merc as an injection oil but if I were to go back to premix, I would probably go back to the 100:1 mixed at 85:1. That a small bottle to 5 gals insted of six. There new 100:1 outboard oil has been reformulated and separated from the air cooled oil so I would expect it to perform even better than when I used it in the past. I have absolutly no fear of any Amsoil product.

pecheux · Sep 28, 2006

Re: 100:1 mix recommendation

I beleve Lubedude to be correct in his statement.

Most 2 cycle oil will write on their containers that it can be used up to 100:1 .. Now this is where the confusion starts since it is basicaly a 50:1 outboard formula.

I tend to beleve Amsoil is different (no solvent) and is a new ballgame. For that reason I will give it a try at 80:1 such as recommended by lubedude. I read elsewhere that this mix ratio is even recommended by Amsoil.

Tx y'awl ...

pecheux · Sep 28, 2006

Re: 100:1 mix recommendation

Lubedude: forgot to mention that I am already using the Amsoil Injector oil in my 9.9 Johnson with incredible results. My (smokey) 15hp Force is the one I ll be experimenting the 100:1 oil at 80:1 with.

LubeDude · Sep 28, 2006

Re: 100:1 mix recommendation

Seems that all different engines like something different, I have heard that the inline six`s like a richer mix. I have yet to use Amsoil in an inline, it would be an interesting test!

jethro66 · Sep 28, 2006

Re: 100:1 mix recommendation

Ihave a 1972 evinrude and I run it at 24-1 dont want to take a chance

deejaycee_2000 · Sep 29, 2006

Re: 100:1 mix recommendation

I run my racing motors on about 30 - 40 : 1, then they last a day or two longer .....

BillP · Sep 29, 2006

Re: 100:1 mix recommendation

A past warranty mgr for OMC International (commercial division - Bahamas, S. America & Bermuda) told me the ONLY reason they went from 100:1 back to 50:1 was due to corrosion issues. New motors were getting trashed after sitting a month or two in humid climes. That was back in the mid 1980s. If memory serves right he said the motors actually needed 150:1 at full throttle and 300:1 at idle to be safe from wear. He told me to run 100:1 if I used my commercial motor (no VRO) every week or on long trips and 50:1 if I let it sit weeks between use.

When compared to oil used for 100:1 in the mid 1980s...Amsoil is doing nothing special at 100:1 unless it has major additives for corrosion protection.

pecheux · Sep 29, 2006

Re: 100:1 mix recommendation

Lubedude writes: I have yet to use Amsoil in an inline, it would be an interesting test!
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My Force outboard is a 2 cyl motor. but I have read some post from another forum (from me) about someone who had used both 100:1 and 80:1 in an inline 6 merc. 115hp or 150hp.

Regards

LubeDude · Sep 29, 2006

Re: 100:1 mix recommendation

jethro66 said:
Ihave a 1972 evinrude and I run it at 24-1 dont want to take a chance

There are no 1972 engines that I know of that required a 24:1 mix.:^ You are likely causing more harm than good.

jethro66 · Sep 29, 2006

Re: 100:1 mix recommendation

Yeah my wallet!! Theres no harm at all

LubeDude · Sep 29, 2006

Re: 100:1 mix recommendation

jethro66 said:
Yeah my wallet!! Theres no harm at all

Not true my friend, Excess oil can cause very serious carbon build up under your rings and cause cylider scuffing and or loss of performance. Oil is one of those things where more isn`t always better.

pecheux · Oct 1, 2006

Re: 100:1 mix recommendation

Lubedude writes: Oil is one of those things where more isn`t always better.
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Jethro66: I second that, I had that carbon build up problem, along with loss of power with a 2 cycle powered scooter using excess oil mix.

Regards

100:1 mix recommendation

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