what’s the difference in 2-stroke oil?

[air-cool-me]

Ok.. so oil isn’t just oil…

But I was advised that I cannot use STIHL brand, or any two stroke oil designed for small engines in my two stroke Suzuki 150hp outboard..

Why is this? What is different about the oil?
Both 2-stroke vs 4-stroke and
“2 –stroke outboard” oil vs regular 2 stroke

im just curious....

-Nick

[5axis]

don't know but castrol A747 is the gold standard for 250 GP racers.
It's also HRC's recomended oil for it's 250 gp bikes.

I think it's priced about $20 per liter

[singpilot]

As soon as the Lubemaster gets up and oils his hair, he'll give a 30 word answer to a 300 word problem.

[Joeaksa]

Originally posted by singpilot
As soon as the Lubemaster gets up and oils his hair, he'll give a 30 word answer to a 300 word problem.

Its already 08:30 in Dallas and no comment from the Lubemeister! Must be busy!

[Tim Hancock]

Not an answer to your question, but I use Amsoil mixed 1 little 8 oz bottle to 5 gals of gas in EVERY two stroke I own that requires pre-mixed gas/oil. I have owned/operated/repaired two strokes for a majority of my 39 years. I have been heavily involved in MX racing, snowmobiling and presently experimental aircraft using 2-stroke engines.

I have used many different brands of relatively cheap to relatively expensive 2 stroke oils, both dino and synthetic over the years.

When I first got involvecd in 2 stroke powered aircraft, I was using Yamalube R in my Honda race bikes. Another aviator that ran an ultralight business suggested I try Amsoil, as that is all he used with proven results (and the Amsoil was cheaper to boot).

For the past 10 years, i have used it exclusively in all my 2 strokes with absolutely zero problems in every two stroke I own (aircraft, MX bikes, chainsaws, weedeaters etc etc).

There are plenty of good oils on the market, however, Amsoil is readily available in my locale and is proven and works for ME.

[gaijindabe]

Maybe the ratio of oil to gasoline is different? Plus, I bet water cooled outboards run a lot cooler... In a pinch, I bet you could use either.

[cbeers]

I was using Yamalube R in my Honda race bikes.

+1 for me.

At rebuild time, my piston and cyl. were nearly perfect.

helps to have a crazy ass 500cc two stroke though, not like you can really wail on that throttle for tooooo long





-Chris

[PorschePilot]

As someone with 20 years of mechanical experience rebuilding 2 strokes from my motocross bike, my advice is go to a motorcycle dealer and by a good quality synthetic 2 stroke oil. I am partial to the Castrol. They won't let you down and good quality oil is cheap insurance.

[Jared at Pelican Parts]

Yamalube is all I ever use in dirt bikes.

[Tim Hancock]

Good to see I was not the only one who used Yamalube (makes me feel like I made a good choice). At the time (early 90's) someone had told me that some members of Team Honda were secretly using Yamalube R.

When re-ringing my race bikes while using Yamalube pistons showed no carbon and wear rates were low. Making the switch to Amsoil made me nervous at first, but since switching, I have had no issues whats-so-ever and it also burns clean.

As I said before, over the years, I have used numerous brands (including Klotz R50, Yamalube R, Golden Spectro, Pennzoil etc etc).

Some were good, some were not so good. The Amsoil is good for me due to being readily available, cheap and I mix it the same for EVERY vehicle I burn it in, with absolutely no lubrication failures of any kind over a 10 year period. Many other oils are capable of the same track record.

I only offer MY preference due to the track record I have established over ten years of abusing numerous two strokes. My ultralight 440cc "snowmobile" engine runs at 6000-6500 rpm for hours at a time and has about 200 hrs on it. I have changed sparkplugs about 4 times just as preventive maintenance. I have never fouled a plug and my engine compression is excellant. I still keep and beat the hell out of mine and my daughter's motocross bikes, all without any issues. My weedeaters and chain saws start easily have have lots abuse in hot weather over the last ten yrs.

[M.D. Holloway]

A dilutable (50:1 nominal) low viscosity that provides lubricity, normally a single weight, no residual (don't want carbon build-up) - must be a clean burning oil.







25 words or less...my work here is done time to take a nap.

[nostatic]

lubricity

I'm gonna use that word at dinner tonight...

[M.D. Holloway]

I hope to use it tonight as well...but not at dinner.

[sammyg2]

There is a big difference between outboard engine oil (PWC's fit in the same category) and motorcycle engine oil.
Personal watercraft and outboards require TWC-III rated oil, it is water soluable, ashless, and works in the lower temps of the water-cooled engines.
If you put regular motorcycle oil in an outboard you are asking for stuck pistons.
My personal favorite for my waverunners is yamalube but you have to make sure it is the TWC-III version.

[fastpat]

Originally posted by nostatic
lubricity

I'm gonna use that word at dinner tonight...

Use it late at night as a compliment to your SO.

"I love your lubricity."

[fastpat]

Originally posted by air-cool-me
Ok.. so oil isn�t just oil�

But I was advised that I cannot use STIHL brand, or any two stroke oil designed for small engines in my two stroke Suzuki 150hp outboard..

Why is this? What is different about the oil?
Both 2-stroke vs 4-stroke and
�2 �stroke outboard� oil vs regular 2 stroke

im just curious....

-Nick

I have the Stihl oil in the orange bottle, and the new synthetic low smoke stuff in the black bottle. Both for for small engines that require mixed fuel.

If I had to guess, the Suzi has an oil tank and injects it's own oil. That being true, means that part of the engine gets straight oil for lube, and just a bit is squirted in the intact, if any at all. I think all of those use a specified weight of regular engine lubricating oil.

By the way, if y'all haven't tried the new Stihl 4 stroke engines on their leaf blowers and some of their weed wackers, you've got a treat in store. They're really nice, quiet, almost no smoke, and very low fuel consumption. And they take oil mix fuel.

[Tim Hancock]

I never answered your original question about the marine oil, but what Sammy said above sounds familar and is probably the answer you are lookiing for (outboard marine engines are about the only small engines I have NOT messed with over the years)

[legion]

Originally posted by nostatic
lubricity

I'm gonna use that word at dinner tonight...

It's the opposite of "gription".

[David]

We use Redline in the shifterkarts. Seems to be much less buildup on the piston and ring than other oils. We mix about 25:1, we even go to 22:1 on really big tracks. We put as much oil in the gas as we can get away with. At that rate we are almost doubling the cost of a gallon of race fuel.

[austin552]

Isn't Lubricity another name for Vegas?