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2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? #4779038
06/06/18 12:00 PM
06/06/18 12:00 PM
Joined: Jul 2012
Posts: 144
Bucks County, PA
Hot_Ajax Offline OP
Hot_Ajax  Offline OP
Joined: Jul 2012
Posts: 144
Bucks County, PA
I have old OPE. Lawnboy mower that's 32:1. Homelite saw that's around 24:1 if not using Homelite oil. Newer stuff is all 50:1. Is is really necessary for all these different mixing ratios, or is the 50:1 oil that's made now good enough for everything? Thank you gents.

Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779048
06/06/18 12:07 PM
06/06/18 12:07 PM
Joined: Jan 2008
Posts: 519
Richmond, BC, Canada
mechjames Offline
mechjames  Offline
Joined: Jan 2008
Posts: 519
Richmond, BC, Canada
I've been told that the ratio was based on the oil's capabilities at the time. 50:1 is standard today and should be fine in everything.
I mix Amsoil sabre at 100:1 for my equipment as per the directions and haven't killed anything yet.


86 Mustang 5.0L 170km - Amsoil XL 5w30 / Baldwin B2-HPG
14 Ram 1500 5.7 - Amsoil XL 5w20 / Baldwin B7443
98 Jeep ZJ 5.9 - Amsoil OE 10w30 / Baldwin B34
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: mechjames] #4779053
06/06/18 12:09 PM
06/06/18 12:09 PM
Joined: Apr 2010
Posts: 4,398
Storrs, Connecticut
jeepman3071 Offline
jeepman3071  Offline
Joined: Apr 2010
Posts: 4,398
Storrs, Connecticut
Originally Posted By: mechjames
I've been told that the ratio was based on the oil's capabilities at the time. 50:1 is standard today and should be fine in everything.
I mix Amsoil sabre at 100:1 for my equipment as per the directions and haven't killed anything yet.


This.

I have customers running 50:1 ratio in older machines calling for 32:1, and they run great. Oils have improved greatly.


2000 Jeep Cherokee 4.0L (180k) - Pennzoil 10w30, Napa Gold 1516, Magnefine trans filter
2009 BMW 328i (33k) - Castrol Edge Euro 0w40, MANN HU816X
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779056
06/06/18 12:12 PM
06/06/18 12:12 PM
Joined: Mar 2013
Posts: 4,755
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,755
The Midwest
I think lawn-boy says 32:1 because they call for use of an ashless outboard oil. I wouldn't be afraid to use an FD rated oil in the lawn-boy and other equipment at 50:1. The Poulan brand at Walmart in the garden center is where you'll find that for $1.38 a bottle. It's not in the auto section with the Supertech two-stroke oils


Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779156
06/06/18 01:59 PM
06/06/18 01:59 PM
Joined: Jan 2015
Posts: 611
missouri
ragtoplvr Offline
ragtoplvr  Offline
Joined: Jan 2015
Posts: 611
missouri
depends

Some older has plain bearings. It needs 24 or 32 to one.

Most newer all roller or ball bearing can use at least 40 to one.

I never use 50 to one.

Rod

Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779158
06/06/18 02:03 PM
06/06/18 02:03 PM
Joined: Nov 2006
Posts: 19,895
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,895
MA, Mittelfranken.de
I run 32:1 in everything 2 stroke except for the big chain saw (16:1), 40 and 50:1 is for emissions which they can shove where the sun doesn't shine. Let the smoke out!


ASE L1, Master. Deutsch Meisterbrief.
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Trav] #4779206
06/06/18 02:32 PM
06/06/18 02:32 PM
Joined: Jul 2005
Posts: 30,415
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,415
NY
Originally Posted By: Trav
I run 32:1 in everything 2 stroke except for the big chain saw (16:1), 40 and 50:1 is for emissions which they can shove where the sun doesn't shine. Let the smoke out!


Reminds me of a talk we had recently. wink I'm going with 32:1. I was running engines that call for 40:1 at 32:1. I recently bought a trimmer that calls for 50:1, now everything I own that runs TC oil is running at 32:1.


God Bless Our Troops

Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: ragtoplvr] #4779218
06/06/18 02:38 PM
06/06/18 02:38 PM
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
BrocLuno Offline
BrocLuno  Offline
Joined: Sep 2015
Posts: 5,839
Kalifornia Kollective
Originally Posted By: ragtoplvr
depends

Some older has plain bearings. It needs 24 or 32 to one.

Most newer all roller or ball bearing can use at least 40 to one.

I never use 50 to one.

Rod


+1 It depends on the design and metallurgy ... I belong to a vintage chain saw group. Some of the old stuff absolutely will not run right on lean mixes ...

If motor calls for less than 50:1 you can arrive at some balance and run all your gear there. I'm happy at about 36:1 for everything. It's a convenient number given my old Eagle cans and mix bottles.

No engine ever died from too much oil. Some have from too little ... frown

Some of the old plain bearing reed valve motors need to be wet ...


Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: demarpaint] #4779222
06/06/18 02:40 PM
06/06/18 02:40 PM
Joined: Jul 2003
Posts: 2,384
MN
tmorris1 Offline
tmorris1  Offline
Joined: Jul 2003
Posts: 2,384
MN
Originally Posted By: demarpaint
Originally Posted By: Trav
I run 32:1 in everything 2 stroke except for the big chain saw (16:1), 40 and 50:1 is for emissions which they can shove where the sun doesn't shine. Let the smoke out!


Reminds me of a talk we had recently. wink I'm going with 32:1. I was running engines that call for 40:1 at 32:1. I recently bought a trimmer that calls for 50:1, now everything I own that runs TC oil is running at 32:1.


Same with me. My son has a YZ250 dirt bike that uses Amsoil Dominator at 32:1, so that is what everything gets now and they run just fine and don't seem to smoke anymore than 40 or 50:1. The leaf blower really rips on the VP race fuel!

Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779227
06/06/18 02:43 PM
06/06/18 02:43 PM
Joined: May 2010
Posts: 1,059
Ocala, Florida
racin4ds Offline
racin4ds  Offline
Joined: May 2010
Posts: 1,059
Ocala, Florida
It isn't all about the oils ability to protect at lesser ratios though. You have to factor in Jetting. The metering orifices and/or jets if it has any are calibrated to work at what the factory set the ratio at. Many folks don't realize that when you go from 32:1 to 50:1 you are using less oil but MORE fuel available in a given amount making the engine much richer than planned, fouling plugs and killing mufflers/spark arrestor screens.

At 32:1 the carb/engine is expecting XX amount of gasoline in the incoming fuel charge. At 50:1 there is significantly less oil!

Studies have been done on two stroke engines showing more power and ring seal is present at mix ratios all the way down to 10:1, so less oil is not always a good thing! Leave it to the EPA to mandate 50:1 and 60:1 ratios at the expense of power and engine life.


Just say NO to thin oils and M1!
05 F350 Powerstroke
05 Hyundai Tucson
08 Legacy GT
2008 Kawasaki Ninja 650R
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: racin4ds] #4779235
06/06/18 02:51 PM
06/06/18 02:51 PM
Joined: Jul 2003
Posts: 2,384
MN
tmorris1 Offline
tmorris1  Offline
Joined: Jul 2003
Posts: 2,384
MN
Originally Posted By: racin4ds
It isn't all about the oils ability to protect at lesser ratios though. You have to factor in Jetting. The metering orifices and/or jets if it has any are calibrated to work at what the factory set the ratio at. Many folks don't realize that when you go from 32:1 to 50:1 you are using less oil but MORE fuel available in a given amount making the engine much richer than planned, fouling plugs and killing mufflers/spark arrestor screens.

At 32:1 the carb/engine is expecting XX amount of gasoline in the incoming fuel charge. At 50:1 there is significantly less oil!

Studies have been done on two stroke engines showing more power and ring seal is present at mix ratios all the way down to 10:1, so less oil is not always a good thing! Leave it to the EPA to mandate 50:1 and 60:1 ratios at the expense of power and engine life.

You are correct Sir!

Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779276
06/06/18 03:23 PM
06/06/18 03:23 PM
Joined: Oct 2014
Posts: 11,816
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 11,816
Idaho
32 to 1 works great.


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779278
06/06/18 03:24 PM
06/06/18 03:24 PM
Joined: Oct 2014
Posts: 11,816
Idaho
CT8 Online content
CT8  Online Content
Joined: Oct 2014
Posts: 11,816
Idaho
oil is good.


"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779308
06/06/18 03:53 PM
06/06/18 03:53 PM
Joined: Mar 2008
Posts: 5,942
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 5,942
Michigan


2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40
Re: 2 Stroke Fuel Ratios: Is 50:1 Good for All OPE? [Re: Hot_Ajax] #4779310
06/06/18 03:58 PM
06/06/18 03:58 PM
Joined: Mar 2009
Posts: 2,623
Cedarbrae, Ontario
xxch4osxx Offline
xxch4osxx  Offline
Joined: Mar 2009
Posts: 2,623
Cedarbrae, Ontario
I run my LawnBoy 10227 and 22261 2 stroke mowers on Amsoil Saber at 50:1 even though both say on the fuel cap to use 32;1 Never had any problems with either.


2015 RAM SXT Crew Cab 5.7 with 6 speed tranny.

2008 Mazda 3 GS Sport Hatchback 5sp MT (Girlfriend's car)

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