661 Oil Test 32:1 vs 40:1 vs 50:1 ?

[bwalker]

It has to be combusted. Otherwise, the crankcase would fill up, or it would all be running out the muffler.

yes, but but by the combustion gases coming in contact with the oil, not by being part of the main event other than a small amount.

 

[KenJax Tree]

Ok i put a gallon of Yamalube 2R mix through today...nothing seemed any different from the others i've been using except the Yamalube does have less smell and its purple.

 

[Whitespider]

The thing your not considering is that most of the oil isnt in the fuel vapor/air charge. Its on the surfaces of the piston, head etc. So, its effects on combustion are different. And we are talking about a ver small percentage of oil in the fuel anyways.

But... but... but... didn't you post...

Some oils have toluene as a diluent and actually raise octane.

So, which is it??

And octane isnt measured by carbon chains. Its measured by a test engine..

Actually there's a mathematical formula that can be used to arrive at an approximate (equivalent) octane number for such things as oil that won't "run" a test engine.
*

 

[Whitespider]

It has to be combusted. Otherwise, the crankcase would fill up, or it would all be running out the muffler.

Correct...
*

 

[bwalker]

But... but... but... didn't you post...

So, which is it??


Actually there's a mathematical formula that can be used to arrive at an approximate (equivalent) octane number for such things as oil that won't "run" a test engine.
*

The toluene flashes off when it enters the motor, so it would be present with the vaporised fuel in the chamber...
I also know empiracly from running high strung race motors that where very detonation sensitive at 16:1 ratios that it has little to no effect with good oils.

 

[Deleted member 83629]

my brain hurts

 

[Whitespider]

As measured by the R+M/2 method..

2,2,4-Trimethylpentane (octane), called isooctane (which is technically incorrect) has a MON octane number of 100, and a RON octane number of 100, giving it a R+M/2 number of 100.
*

 

[Ray Bell]

As measured by the R+M/2 method..

Gawd how I hated organic chemistry in school. All these chains and valence tables are giving me a headache. I am enjoying this thread though. Has it changed any minds?

 

[Deleted member 83629]

i will stick to lucas 2 cycle oil at 32:1 because klotz smells like a over smelly fruit market when i use it.

 

[KenJax Tree]

i will stick to lucas 2 cycle oil at 32:1 because klotz smells like a over smelly fruit market when i use it.

Yamalube does seem like good oil and has less smell than Lucas. My exhaust ports were damp but the mufflers were dry and the piston skirts had a nice coating of oil. I guess the only advantage of Lucas is that its available at O"Reilly's on Sundays if needed.

 

[KenJax Tree]

i will stick to lucas 2 cycle oil at 32:1 because klotz smells like a over smelly fruit market when i use it.

5 minutes is all i can handle

 

[CR500]

Just curious has anyone tried the "other" oils from Bel-Ray?

like MC-1, SI-7, or SL-2??

 

[KenJax Tree]

I've used MC-1 and it was ok but its really thick and Bel-Ray recommends 50:1

 

[CR500]

I've used MC-1 and it was ok but its really thick and Bel-Ray recommends 50:1

They make a semi synthetic....lol

 

[KG441c]

Yamalube does seem like good oil and has less smell than Lucas. My exhaust ports were damp but the mufflers were dry and the piston skirts had a nice coating of oil. I guess the only advantage of Lucas is that its available at O"Reilly's on Sundays if needed.

I saw the same in my 440 today as you are describing

 

[Deleted member 83629]

Just curious has anyone tried the "other" oils from Bel-Ray?

like MC-1, SI-7, or SL-2??

SI-7 smells a little soapy
SL-2 is pretty good
bel ray mineral 2t is good but tough to find its rated api tc

 

[Deleted member 83629]

i tried motul 800 at 50:1 in my husqvarna trimmer today it has a cat muffler it had a soapy perfume to it had a oiler exhaust port bone dry muffler and the internals were well coated with oil.
tried the same mix in the autotune 545 of my dads and it showed its butt using it but after letting it warm up it seemed fine.

 

[KenJax Tree]

SI-7 smells a little soapy
SL-2 is pretty good
bel ray mineral 2t is good but tough to find its rated api tc

MC-1 isn't mineral, its full synthetic. In fact i still have some[emoji2]

 

[Deleted member 83629]

MC-1 isn't mineral, its full synthetic. In fact i still have some[emoji2]

 

[Deleted member 83629]

i tried MC-1 i dont care for it, its burns a little dirty at 32:1