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

[KenJax Tree]

they make a full syn thought that is what you were using. I'll have to check the msds to make sure I have the right one.

 

[KenJax Tree]

The only full synthetic i've used recently is Maxima K2

 

[bwalker]

found this on a msg board...

So why shouldn't 2R be used in injector systems? Or this just another tricky marketing ploy?

Mineral based injector oils usually have a different dilutent makeup. Basically they have to control the pour point to keep the paraffin content of the oil from compromising injector flow at lower temperatures. Lower priced oils tend to have have higher paraffin contents and need greater volumes of dilutent to control low temp flow. This isn't to say 2R can't be used in an injector, it's more a case of consideration for these issues may not have been specifically addressed during the design phase.

It probaly could in warm weather.

 

[KenJax Tree]

I'd have to agree with bwalker on this.

probability is pretty low that lucas is of the same quality as a racing oil like 2r.

I'm not doubting that in a MX racing application the 2R is the much better choice, but for a chain saw or OPE application its gonna do the same thing.

Idk who knows, one is just as available as the other and they're the same price so maybe i'll use 2R or maybe i'll use both[emoji1]

 

[bwalker]

I'd have to agree with bwalker on this.

probability is pretty low that lucas is of the same quality as a racing oil like 2r.

Btw Redbull, the guy you quoted is Rich Rohrich. He's forget en more about fuels and oils than I will ever know. He's the one turned me on to both 2R and Mobil mx2t years ago.

 

[bwalker]

Like to get an idea of what everyone thinks things SHOULD look like... I'm guessing there will be some vary different opinions. Or maybe not?


IF one is running a good oil at the correct mix ratio...

what should the top of their piston look like?

how about the piston skirts?

how about the rings?

how about just above the ring(s)? (between top ring and top of piston.)

How about the inside of the muffler?

How about the exhaust port?

Assuming the engine is tuned properly the piston should have a coating of fine carbon, with no mettalic ash present and a slight wash where the transfers discharge. Cleaner the better for the ring area and exhaust port and the muffler should be bone dry.

 

[KenJax Tree]

Too rich if the muffler is slightly damp?

 

[blsnelling]

Too rich if the muffler is slightly damp?

Or too heavily mixed.

 

[KenJax Tree]

Or too heavily mixed.

Its not that i mix 40:1....i do like my work saws a little fatter, maybe they're just a hair too fat i gotta push slightly for them to clean up.

 

[Trx250r180]

I learned the hard way not to use 927 castor in injectors on the kids lt80 ............... 4 top ends later

 

[bwalker]

Too rich if the muffler is slightly damp?

Or the wrong oil for your use. Or a poorly scavenged motor.

 

[bwalker]

Or too heavily mixed.

I've run 20:1 with done dry exhaust.

 

[redbull660]

this 661 was broken in and run on h1r. This is approx 9-10 tanks.

exhaust port - slight brownish but still transparent discoloration

top of piston - very very thin layer...hard to see exactly. There is a difference where the transfers are

my only concern is the area just above the top ring (between piston top and top ring) - some brown.


Guesses at the ratio i've been running?

 

[blsnelling]

I would expect that to be brown.

 

[Hedgerow]

this 661 was broken in and run on h1r. This is approx 9-10 tanks.

exhaust port - slight brownish but still transparent discoloration

top of piston - very very thin layer...hard to see exactly. There is a difference where the transfers are

my only concern is the area just above the top ring (between piston top and top ring) - some brown.


Guesses at the ratio i've been running?

4 glugs per gallon?

 

[bwalker]

this 661 was broken in and run on h1r. This is approx 9-10 tanks.

exhaust port - slight brownish but still transparent discoloration

top of piston - very very thin layer...hard to see exactly. There is a difference where the transfers are

my only concern is the area just above the top ring (between piston top and top ring) - some brown.


Guesses at the ratio i've been running?

Much too early to say anything.

 

[Trx250r180]

I would turn the H screw 1/8 clockwise

 

[porsche965]

I would turn the H screw 1/8 clockwise

If there was a screw....

 

[KenJax Tree]

Could as little as 300-500 rpm be the difference between a slightly damp muffler and dry?

 

[porsche965]

Could as little as 300-500 rpm be the difference between a slightly damp muffler and dry?

Or just the ratio in need of tweaking a bit