SEF brand pre-mix 40:1 50:1

[livemusic]

Bought at Walmart, SEF (Small Engine Fuel) premix and the label says 40:1 - 50:1. How can that be?

The SEF brand is made by VP Racing Fuels. It was $5/can. Trufuel is $6/can at Stihl dealer.

I note that Trufuel is 92 octane and this SEF is 90 octane. But I think I have read that 89 octane is enough anyway?

I ran it in my Stihl BG86 leaf blower and it ran fine. Just wondering how it can serve both 40:1 and 50:1 engines.

BTW, I blew pine straw off my roof and I used almost a full tank of gas! That makes you see that this premix fuel is really expensive! I think it was about half a can, so that's $2.50. Using gasoline/oil, probably would have been about 25 cents!

 

[Ronaldo]

Its likely just stating that it will work for both applications......40:1 and 50:1.

 

[livemusic]

Its likely just stating that it will work for both applications......40:1 and 50:1.

Well, yeah, that IS what it's saying, but how can that be? Is it that it's 40:1? One can run 40:1 in a 50:1 saw long-term with virtually no ill-effects, right? But the same can't be said for using 50:1 in a 40:1 saw long-term? Or is it to be inferred that there is some special ingredient in this product?

 

[Absolution]

I wouldn't run pre mix if I was you.
These are from redbull661 he has ran various oils and documented them.

This is the vp fuel.

 

[pgk1]

I have a 1990's McCulloch PM605 I just came across the manual for it, it said to use a mixture of 20:1 if using a regular castor based oil and 40:1 if using a synthetic oil. More than likely both the VP and SEF are using synthetic oils both of which would be safe in a 40:1 and 50:1 engine. I ran 32:1 castor based in it for decades and this saw still runs perfect. A friend of a friend has a RC 1/5th scale that has a 57 CC twin, he is into 100 mph plus speed runs his motor redlines close to 19,000 rpms and he usually runs Motul 800 a german made full synthetic at 100:1 and has never had a oil related failure of any kind, granted running 100;1 you better have your tune dialed in. Iv'e been running the Motul 800 in all my 2 strokes the last couple of years and it does burn very clean.

Pete

 

[livemusic]

I wouldn't run pre mix if I was you.
These are from redbull661 he has ran various oils and documented them.

This is the vp fuel.

Was there a thread for this or a link to another site? Would like the see the verdict if he came up with a conclusion regarding best fuel.

 

[Absolution]

Was there a thread for this or a link to another site? Would like the see the verdict if he came up with a conclusion regarding best fuel.

He didn't make a thread but in one of our messages we got on the topic of oils. If you want I could forward them all to you. By far the pre mix was the worst in my opinion.

The best which I think multiple would agree on this site is Schaeffer. I don't have easy access too it however.

 

[livemusic]

He didn't make a thread but in one of our messages we got on the topic of oils. If you want I could forward them all to you. By far the pre mix was the worst in my opinion.

The best which I think multiple would agree on this site is Schaeffer. I don't have easy access too it however.

So, this fellow 'proved' that premix is inferior to WHAT? Gasoline and oil? If so, what gasoline and what oil, lol! And this is regarding carbon buildup? You're saying that premix is more harmful? If so, Stihl and other manufacturers are lying. Which doesn't surprise me that a corporation lies, lol.

Even if it's 'worse,' I can see a possibility that is good for the average homeowner to use premix. For other reasons.

 

[Absolution]

So, this fellow 'proved' that premix is inferior to WHAT? Gasoline and oil? If so, what gasoline and what oil, lol! And this is regarding carbon buildup? You're saying that premix is more harmful? If so, Stihl and other manufacturers are lying. Which doesn't surprise me that a corporation lies, lol.

Even if it's 'worse,' I can see a possibility that is good for the average homeowner to use premix. For other reasons.

Wow hold your horses buddy you are jumping to huge conclusions. This "fellow" was just running different oils though new saws and showing results. I'll just show you the two ends of spectrum just so you can get an idea. That carbon build up was hard and flaky. Which can cause damage.

 

[Absolution]

Wow hold your horses buddy you are jumping to huge conclusions. This "fellow" was just running different oils though new saws and showing results. I'll just show you the two ends of spectrum just so you can get an idea. This carbon build up is hard and flaky. Which can cause damage.

Edit: not all oils are the same. Nor does the name or price of it dictate it's quality. Like stihl silver bottle was known for wrecking motors. However Recently they may have changed it since I've not heard anything. I've been running husky oil for a while now and it runs a lot cleaner while leaving a good amount of oil behind. However it is not as clean as schueffers since it has a slight amount of burn in. The attached photos were from one of my saws running husky oil after about 4 tanks on new rebuild

 

[andyshine77]

There is nothing at all wrong with any of the premix fuels, other than price. A lot variables depends on how an oil burns in equipment.

 

[Nutball]

Maybe the pre mix is something like 45:1? 50:1 in a 40:1 engine will run a richer tune, and leaner the other way around.

 

[andyshine77]

Maybe the pre mix is something like 45:1? 50:1 in a 40:1 engine will run a richer tune, and leaner the other way around.

The difference between 50:1 and 40:1 will have essentially no real effect on the mixture.[emoji111]

 

[sundance]

I assume it's Schaeffer's 9000 being recommended? Looks like the 7000 is for water cooled 2 strokes. I'm looking for a replacement for the Mobil 1 racing 2T I'm almost out of.

 

[huskihl]

I've only run the 7000. Works great

 

[andyshine77]

I like Maxima K2 and Honda HP2. Lots of guys like the Schaeffer's but it still not an oil made for air cooled engines.

 

[Stump Shot]

I've only run the 7000. Works great

Didn't you miss the other 2000?

 

[huskihl]

Didn't you miss the other 2000?

Not at all.
I've had pretty good results listening to Tree monkey. Just gonna roll with it

 

[qurotro]

Amsoil saber?

 

[Stump Shot]

Amsoil saber?

Anything but Stihl oil, that stuff is like burning the wood you're cutting.
There's two more saws that died from it here in the shop.

You fellas can go to the oil thread to see what the flavor of the day is.