2 STROKE ENGINE OIL CONTEST

[Jaguar]

The person that gets closest to my fuel/oil ratio calculators recommended ratio (for your engine and oil) wins a $25 credit towards any of my 2 stroke spreadsheet calculators (www.dragonfly75.com/moto/calculators.html). Just list your max RPM (or engine size and type riding and I’ll estimate the max RPM), type of cylinder cooling (air or water), and which oil you use from the list below. Everyone who participates gets a free copy of the fuel/oil ratio calculator.
Amalie - SynPlus
Bel-Ray - SL-2, MC-1, H1-R
Klotz - BeNOL, Techniplate TC-W3
Motul - Scooter Expert, 510, 710, 800 Off Road, 800 Road Racing, Kart Grand Prix
Maxima - Scooter Pro, Super M, Formula K-2, Premium 2, Castor 927
Amsoil - Dominator, Saber
Repsol - Moto Racing, Moto Off Road
Shell - Advance Ultra
PJ1 - Goldfire Pro
Red Line - AllSport
Yamaha - Yamalube 2R
Lucas semi-synthetic
Royal Purple HP 2-C
Schaeffer Supreme

How does my oil ratio calculator work? It uses the oils viscosity in combination with the change on it that the estimated upper cylinder temp (estimated by max RPM and type of cylinder cooling) causes and figures out a ratio that results in a target diluted viscosity (diluted by gasoline). This ratio is usually very close to what oil manufacturers recommend.

“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.” https://www.machinerylubrication.com/Read/28956/lubricant-viscosity-index

“Viscosity of a fluid is a measure of its resistance to gradual deformation by shear stress or tensile stress.” https://www.engineeringtoolbox.com/dynamic-absolute-kinematic-viscosity-d_412.html

“Viscosity is very important because it affects the oil's ability to reduce friction and transfer heat.”
https://www.oilspecifications.org/articles/what-is-viscosity.php

“An oils first line of defense is its viscosity. 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.”
https://www.aijiuyujia.com/best-2-stroke-motorcycle-oil.pdf

[uberkron]

I pre mix 50:1 penrite green keepers oil.

In a 50cc that gets high rpm use.

Who cares?
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i ride a zip 50 2smoke. It overtakes a hundred times a day.

[redeem ouzzer]

More over complex bullshit.

Run everything 30:1 on modern fully synth. Worry about other things.
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Be a REAL MAN!

[Jaguar]

Do you not worry about plug fouling and spooge from using too much synthetic oil? You should. Better yet do something about it and use the correct ratio.

[Jaguar]

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.

[thx1138]

I dont understand techno gubbins i just pour putoline mx 2t oil into the oil tank

[Monkeywrenche...]

[-]

I use none of those oils in the UK. In fact, I've not even heard of half of them on this side of the pond. For premix, I use Castrol A747 and for road Silkolene Pro 2 or Castrol Power 1.

Your suggested ratios also seem to be aimed at MotoX style riding and bikes, where they can run leaner oil ratio's because they're not sat at full constant revs for long periods like road race bike engines have to endure. I always run 30:1 on my TZR250 race bike and it's never seized once. I suspect it would have locked up loads of times if I attempted 50:1.

You seem to be getting dangerously close to spamming with this now. I'd tone it down a bit before people start getting annoyed.
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TZR250 2MA road, TZR250 1KT road, TZR250 2MA race, TDR250, YZF-750R Boost colours.
Jaguar S Type 3.0 V6 Sport R, VW Transporter T5 GP LWB Shuttle 140ps DSG.

[blurredman]

I use the cheapest bulk buying mineral oil at 30:1 or whatever it ends up being. I don't measure anything. I just chuck a pint in per tank.

Been fine for 15,000 miles.
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CBT: 12/06/10, Theory: 22/09/10, Module 1: 09/11/10, Module 2: 19/01/11
Past: 1991 Honda CG125BR-J, 1992 (1980) Honda XL125S, 1996 Kawasaki GPZ500S, 1979 MZ TS150.
Current: 1973 MZ ES250/2 - 18k, 1979 Suzuki TS185ER - 10k, 1981 Honda CX500B - 91k, 1987 MZ ETZ250 (295cc) - 40k, 1989 MZ ETZ251 - 51k.

[Jaguar]

mpd72, of course you never seized because you are using twice as much oil as you need to. Castrol A747 is made for multi-cylinder road race engines which means for an RPM much higher than your 250's 11,000. My calculator shows their 40:1 is good up to 17,000 RPM. I'm going to contact Castrol and ask them up to what RPM it's good for.

[Ste]

You will provide a BCF discount?

[Jaguar]

monkeywrench, only about 1 in 30 oils give a specific guide for fuel/oil ratio. that's where my calculator steps in, to fill the gap and end the guesswork.

[Ste]

And the BCF discount?

[weasley]

[weasley]

[Jaguar]

oils other than group 1 oil have a high flash point so when an oil contains group 1 oil then I factor in to increase the amount of oil a bit. the total volatility of the engine oil is of no concern because a low volatility just indicates presence of solvent. It flashes off and leaves the oil which has good resistance to heat.

[Ste]

Are you going to provide a BCF discount or do you want to get smacked with many spam ratings?

[Nobby the Bastard]

So what happens when someone follows your recommendation rather than the manufacturers and the engine goes kablueee?

Are you going to pay for the rebuikd?
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[RhynoCZ]

Just run 1:10 diesel with petrol pre-mix.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[Riejufixing]

Try tractor vaporising oil (TVO).

[Jaguar]

Ste, you want a discount after I offer a free software and a prize for the best guesser? Do you want the shirt off my back too? My pipe software has already proven itself better than the expensive programs and it costs 1/8th what they do. If you want it for free you'll have to win the contest.

Nooby, what my program suggests is way way less likely to screw things up than what the oil bottle suggests which is usually 20:1 to 50:1 (take your pick).
I think some of you dirt bikers have fallen on your head too many times. I already showed you how my software is right on the money. do you also ask your mommy to hold your hand when you cross the street? oh, after she guarantees that you won't get run over. That guarantee is all important.

sorry ya'll. I'm a nice guy till people stretch me to my breaking point with stupid shit. I'm too old for nonsense. This post isn't even about the software I sell. It is about the free oil ratio spreadsheet. What spam? jeesh god all-fucking-mighty

[weasley]

[struan80]

I want it all I want it now, get given it to me.

Get a cruiser and all will be fine.

[stevo as b4]

I don't think many road or track riders especially of classic two strokes are really willing to change or experiment with different oils and ratios to what has worked for them for a long time.

Remember a race bike with a ton of spares and a big budget or a team looking for an advantage over the almost identical next team might be willing to try these things or experiment further than most. A piston or engine failure and or a race win are closely related at the extreme end of racing.

As for the pipe software you have got/developed and proven. Well I've never looked at it or used it to try and design a very good pipe for one of my bikes. I'd love to have the ideal pipe for my needs for every bike I own but it's not that simple.

Im not a two stroke tuner or profess to know anything about the subject so I'm not confident or convinced that I know what to key into a programme with no experience to get a pipe design spat out that I know will work well.

I've recently paid over £300 to have a custom 125 pipe designed and simulated and expertly cut out, shaped, joined and welded up for me and done to a very high aesthetic standard too. It was worth every penny of that when you think of what's involved in doing it and the knowledge and know how that goes into it.

Ive heard that my tuner uses a very expensive full engine simulation package and I believe that my pipe is going to get everything usable and worth having out of my engine. None of this software or programs are worth having without someone who knows what to do with them, and has experience and dyno proven knowledge of how to use them and get results. That's why I went to a highly regarded tuner and pipe builder.

[struan80]

Is Stevo Tef in disguise?