2 STROKE ENGINE OIL CONTEST

[Ste]

[-]

[-]

[Ste]

dragonfly75.com is a scam

YFPOS.

[Riejufixing]

[Ste]

Quotes before any editing happens.

[Nobby the Bastard]

[Ste]

Baby shark.

[G]

[MCN]

[Nobby the Bastard]

[Jaguar]

The baseline needed fuel/oil ratio is determined on what the engine oils viscosity will be at the estimated upper cylinder temp. If you know the oils 40*C and 100*C viscosity then at this site (https://www.jiskoot.com/services/calculations/viscosity-temp) you can calculate its viscosity at 150*C and 200*C which are two data points my oil ratio calculator uses to determine the needed ratio. Why focus on viscosity? Because of these quotes from experts in the field:
“Viscosity is the single most important physical property of a lubricant. It is a crude measure of a lubricant's molecular constitution from the standpoint of hydrocarbon chain size. Viscosity determines film thickness and film strength.

Viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.

Viscosity is very important because it affects the oil's ability to reduce friction and transfer heat.

An oils first line of defense is its viscosity (thickness). The ability of the oil film to prevent contact between the rings and the cylinder is a function of an oils viscosity. Generally speaking, the more viscous or thicker an oil, the greater load it will carry.”

To double check I spoke on the phone with Joey Cabrera at Motul and he assured me that I was on the right path by thinking that the principle consideration is the final mixed viscosity.

Of course an engine oil can have special additives that contribute to engine protection beyond what the oil viscosity does. But those are expensive and so if any are added then not much is added. And that is their “secret info” they won’t publish so instead of guessing at who’s got what I chose to focus only on viscosity. So if you use the ratio my calculator shows then you have no worries of seizure due to too little oil.

[Ste]

YFPOS.

[Chuffin Nora]

[-]

[-]

[GSTEEL32]

[Jaguar]

Miami pig, if I am "just wrong" then how come my calculator is so right on?

Examples of my calculators trueness:
fully synthetic oil:
Motul recommends their 800 Off Road be used at 50:1 and my calculator shows its ratio to be 51:1 for a water cooled engine reving to 12,000 RPM.
I choose 12,000 for extreme use because that is what a modern 125cc revs to. And the oil manufacturers usually recommend a racing oil at a ratio that will protect an extreme motocross engine such as a 125cc.
synthetic/mineral blends:
Golden SX2 is recommended at 32:1 and my calculator shows that same ratio for a water cooled engine up to 12000 RPM.
Golden Spectro is recommended at 42:1 and my calculator shows exactly that for a water cooled engine up to 12000 RPM.
mineral oil:
Spectro 2T is not advertised as a racing oil but something that can be used in oil injector systems so we can say it is for up to 10,000 RPM at the recommended ratio of 32:1 which is exactly what my calculator shows for it at 10,000 RPM.

[redeem ouzzer]

Lol if I convince my mate it’s ok to run his YPM bike on A747 at 50:1 and it shits itself is OP going to come to Brands Hatch next weekend to apologise and help us fit the spare engine?

Thought not.

Luckily even BCF sees that this thread is exceptional.
____________________
Be a REAL MAN!

[grr666]

Has OP discovered women and wine yet? Maybe when you do you'll stop thinking far, far too much about oil and just start topping
your engines up with it like normal people do. I'm no expert, but all this long winded and frankly boring oil bollocks seems like
pure, undiluted vagina repellent to me. But we would need a female opinion to confirm, if you can find one that wants to post
in this aids victim of a thread. I bet when this guy walks past a group of women the combined sound of their vaginas drying up
and snapping shut sounds like a round of applause. I'd say bore off but it's way too late for the bore bit.
____________________
Currently enjoying products from Ford, Mazda and Yamaha
Ste wrote: Avatars are fine, it's signatures that need turning off.

[-]

[tittymcarsefa...]

This snake oil salesmen is all over the internet at the moment,

he doesn't get that just because an oil can theoretically be run at a certain ratio doesn't make that the CORRECT ratio for every engine for reliability under real world riding conditions.

A bike set up for 30:1 from the factory can't magically run 50:1 with no other changes and may never be capable of running a leaner ratio reliably even if the oil can take it.

Engine manufacturers don't "guess" the ratios and riders don't change ratio on the fly with each new brand of oil they try.

At the end of the day any ratio leaner or richer than that what the engine builder recommends is a risk that the operator must take, if it blows up tough shite.

[tittymcarsefa...]

[tittymcarsefa...]