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is 50:1 enough oil? #5461368 06/24/20 10:03 AM
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Fordiesel69 Offline OP
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I decided to tear down and decarbon one of my good trimmers that I have owned since new. It was broken in on echo 50:1 synthetic canned fuel, and then I personally pump in 0.990 gallon (just to be safe) of ethanol free and dump the 2.6oz container into it. I even rinse the bottle to get every bit of it out.

There are some vertical scratches in the cylinder and piston skirt. I wonder why? I am noticing on all used two stroke engines the cylinders have high wear. Do we need to go back to 32:1 or 40:1?


99' Crown Vic Police - SAP (P71)
00' Crown Vic Police - SAP (P71)
08' Crown Vics Police - SAP(P71's) (total of 3 garage queens)
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14' Fusion S Base
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461376 06/24/20 10:15 AM
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demarpaint Offline
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I run mine at 32:1. I pulled apart enough 2 stroke engines that were run at 50:1 to convince me 32:1 was the way to go. hide Landscapers who run machines hard do the same around here.


God Bless Our Troops

Re: is 50:1 enough oil? [Re: Fordiesel69] #5461382 06/24/20 10:28 AM
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Barkleymut Offline
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my 21 year old Echo 2601 has run on either 50-1 or 75/100:1 Amsoil since birth. Ran it commercially for 8 years and the last 13 have been an easy life as my homeowner model. I think that I pulled the muffler off once or twice in its life to clean the carbon. Other than that it hasn't complained except for needing a new china carb. The power is still close to what it was when new. Run whatever makes you sleep better, but 50:1 will give it a long life.

All of the same can be said about my Stihl br400 blower.


09 Vue 2.4L 4spd AT/ 09 Flex 3.5L / 96 F150 5.0 5speed / 07 Mustang GT auto
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461387 06/24/20 10:35 AM
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Rat407 Offline
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I would say an air filter problem more so than a lubrication problem.


2014 Cruze Diesel 5w-30 AMSOIL
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461389 06/24/20 10:37 AM
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krismoriah72 Offline
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This is just an opinion but i think some engines are built better than others.. there used to be thought that the 300hr rated ones were better than the 50

For instance the Echo SRM225 and Husqvarna 223 used to be 300hr...but now they are 50hr.

To answer your question- 50:1 is fine, 40:1 is great, 32:1 is great but borderline overkill.. when it comes to wear/longevity

I run JASO FD at 40:1 and sometimes at 32:1 and am confident that something other than the engine will give me an issue for many years.

Scratches- possibly something got by the air filter..

Re: is 50:1 enough oil? [Re: Fordiesel69] #5461410 06/24/20 11:08 AM
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andyd Offline
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32:1 allows me to run 87 E 10 and 4.99/ qt Valvoline universal mix oil. Seein' oil drip out of the mufflers on the wackers and the Mantis lets me know stuff is oiled. I use an empty Tru-Fuel can and 1oz of oil. I get about 3 yrs per qt of oil. Decades of doing this with my Stihl saw, tells me it is a way to keep a small engine happy. TCW3 is great for the little air cools at 32:1 for OPE. Hobby use guys run up to 100:1 but life suffers grin2


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461418 06/24/20 11:24 AM
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jeepman3071 Offline
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Yes, 50:1 is perfectly fine, when a good oil is used. Running a different oil ratio like 40:1 or 32:1 won't make cheaper built equipment last any longer.

Lately I've been noticing that customers running richer oil mixes have had issues with spark arrestors clogging and causing no starts. Newer equipment especially with cat convertors are very sensitive to using the correct oil mix ratio. Don't over think it, use a quality 2-stroke oil mixed at the manufacturer's recommended ratio and go on with life. I've actually never seen a 2-stroke machine that was worn out from not using enough oil, only from no oil at all, a mechanical issue (looking at you Stihl and your Chinese junk bearings), or from factors outside the engine itself (trimmer head sloppy and loose, etc).


1998 Jeep Wrangler Sahara 4.0L/5MT (157k) - PHM 10w30, Wix 51085
2009 BMW 328i N51 (63k) - Liqui Moly 5w40, MANN HU816X
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461444 06/24/20 12:01 PM
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Chris142 Offline
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Back in my 2 stroke 3 wheeler days I Ran 40:1 for trails and 32:1 at the sand dunes.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461448 06/24/20 12:08 PM
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dlundblad Online Happy
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50:1 is fine. I’d blame the air filter.


03 Jeep WJ 4.0 208k
02 Volvo S60 2.4T 199k
97 Chevy Blazer 4.3 175k
04 Audi A4 3.0 210k

Re: is 50:1 enough oil? [Re: Fordiesel69] #5461449 06/24/20 12:09 PM
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FowVay Offline
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I am also a 40:1 proponent. I like to see some residual oil in the crankcase when I take the crankshaft out. I have one piece of equipment that I run Blendzall Racing Castor exclusively in (a blower) and the rest of my equipment gets a diet of whatever I grab from my excessive stock of oils. I have Torco GP-7, Yamalube 2S, Opti-2, Amsoil Saber, Redline no-smoke, Husqvarna XP, Quaker State multi-purpose, and I think a couple of others.

I have had my eye on a bottle of Klotz R-50 over at Summit Racing so it'll be tried this summer at some point. I just love the sound of a sweet little 2-stroke humming along at 8,000 RPM.

Re: is 50:1 enough oil? [Re: Fordiesel69] #5461459 06/24/20 12:24 PM
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CT8 Offline
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32 to 1 for my string trimmer and blower they are 20 years old the Exhaust ports are clean in all and the spark plugs are origin alI used mostly a universal 2 stroke oil that was $14.00 per gallon bulk tank price . Since I moved I have use VP syn oil I .I ave never used a fuel stabilizer and they start first or second pull in the spring. I use about 5 gallons of the 32 to 1 gas mix per year .


2015 F150 2.7
2018 F350 6.2
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461461 06/24/20 12:29 PM
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justintendo Offline
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vertical scratching is dirt entry...which also means the rod and main bearings have seen some level of damage..
i run 40:1 myself, its more about being jetted correctly than oil ratio in lawn stuff like this...but i wouldnt go with less oil than 50:1.


13 escape 2.0 awd mobil 1 10w30ep
08 fusion 2.3 mtx mobil 1 5w30ep/redline mt90
96 f150 4.9 2wd mtx mobil 1 10w30hm/redline ps fluid
99 kaw zrx 1100 redline 10w40
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Re: is 50:1 enough oil? [Re: FowVay] #5461469 06/24/20 12:45 PM
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Chris142 Offline
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Originally Posted by FowVay
I am also a 40:1 proponent. I like to see some residual oil in the crankcase when I take the crankshaft out. I have one piece of equipment that I run Blendzall Racing Castor exclusively in (a blower) and the rest of my equipment gets a diet of whatever I grab from my excessive stock of oils. I have Torco GP-7, Yamalube 2S, Opti-2, Amsoil Saber, Redline no-smoke, Husqvarna XP, Quaker State multi-purpose, and I think a couple of others.

I have had my eye on a bottle of Klotz R-50 over at Summit Racing so it'll be tried this summer at some point. I just love the sound of a sweet little 2-stroke humming along at 8,000 RPM.

How do you like the Torco oil? It is the only oil I run in my stuff.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: is 50:1 enough oil? [Re: Fordiesel69] #5461486 06/24/20 01:00 PM
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thastinger Offline
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I run 40:1 in everything. I'm just a homeowner but I have all Stihl stuff and good bit of ground to maintain. I buy a 6 pack of the stihl oil when I buy the machine because they double the warranty, but I don't use it. I use the VP oil as it has better specs. I'm able to get non ethanol at my local marina.

Re: is 50:1 enough oil? [Re: Fordiesel69] #5461518 06/24/20 01:59 PM
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I also run 40:1 in everything and my stuff runs perfectly and starts quickly.


1993 Porsche 964, 2001 Ford SVT F-150 Lightning, 2004 Chevrolet Corvette, 2018 Toyota Tundra 5.7L
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