Oxygenated 2 stroke race fuel....better?

jeffro503
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jeffro503
Edited Date/Time 4/30/2019 3:23am
I've been having good luck on my RM running the standard Sunoco 110 running 50/50 with non ethenol clean fuel 91 , but reading some older threads on race fuel , some guys had mentioned a leaded Oxygenated 2 stroke race fuel runs even better , and 2 strokes can take advantage of this. I believe it also costs more , but wanted some opinions on it. There is a distributor out by where I'm working today and I need to get some more race fuel. They sell Sunoco out of the 5 gallon cans quite a bit cheaper then what I can get them at the bike shop. Not sure if they sell VP? I'll have to ask.
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kott0n
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kott0n 3/16/2017 8:21am
3/16/2017 8:21am
What are you paying for the 5g Sunoco?

I'm getting 5 gallons of vp110 for $55 +tax
kott0n
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kott0n 3/16/2017 8:24am
3/16/2017 8:24am
The T2 is nice. I might crunch the numbers and see if it's more cost effective by the time I cut the 110 with 93 ethanol free then add the oil.
bvm111
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bvm111 3/16/2017 8:28am
3/16/2017 8:28am
https://vpracingfuels.com/product-category/fuels/racing-fuels/?pa_oxyge…

Jeff this is VPs page with the oxygenated Leaded fuels, I believe the MRX02 and MR2 are the ones that are supposed to make a 2 Stroke pretty happy if it hasn't been modified.

If you modify and raise compression I would run at a minimum VP110 but preferably C12!

When I was in Reno I could get C12 for 65ish a 5 gallon pale but, here in Vegas I just paid 91!!!!!

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jeffro503
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jeffro503 3/16/2017 8:40am
3/16/2017 8:40am Edited Date/Time 3/16/2017 8:43am
I will call them here at about 9am when they open , but I think they only sell Sunoco. The standard 110 was like $47.90 for a 5 gallon can if I remember right. The Mo2X stuff is what I was looking at , and they have in their description that it's really good for 2 stroke racing motors. But wanted some input from you guys on weather it's worth the extra cost. Better performance can be noticed ect....
Bruce372
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Bruce372 3/16/2017 8:51am
3/16/2017 8:51am
Jeff, unfortunately, sunoco fuels are oxygenated with ethanol.
Bruce372
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Bruce372 3/16/2017 8:52am
3/16/2017 8:52am
And for what it's worth, the only time I've blown up a 2 stroke was with sunoco gt260 unleaded.
518Buck-Nasty 3/16/2017 8:53am
3/16/2017 8:53am
I run MRX02 in my cr250 and it made a very noticeable difference but it cost 125 for 5 gallons. I am racing it in the A class so most times I make about 100-150 if I do alright so I can justify the cost. If I was racing for a $5 trophy I'd probably just run MS109. Still a noticeable difference but not like mrx02. That is the hands down best fuel for a twostroke motor. The lead content is good and when you take apart your motor it still looks like brand new. No carbon buildup at all. Hope this helps. If you can afford it run mrx02.
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mxb2
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mxb2 3/16/2017 9:11am
3/16/2017 9:11am
Renegade sx2, sent you a info text. Jeffro.
mjr119
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mjr119 3/16/2017 9:16am
3/16/2017 9:16am Edited Date/Time 3/16/2017 9:17am
MR12 is the best fuel, hands down. But also way pricier than what you guys have been listing. It is leaded and oxygenated.

Edit, I use this is 4 strokes, not 2 strokes.
mxb2
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mxb2 3/16/2017 9:19am
3/16/2017 9:19am
mjr119 wrote:
MR12 is the best fuel, hands down. But also way pricier than what you guys have been listing. It is leaded and oxygenated. Edit, I use...
MR12 is the best fuel, hands down. But also way pricier than what you guys have been listing. It is leaded and oxygenated.

Edit, I use this is 4 strokes, not 2 strokes.
Agreed,, pro6, really good, and. Renegade sx4+, dragon, ti Lube, ets. Plenty of choices. If you have the $$.
jeffro503
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jeffro503 3/16/2017 9:38am
3/16/2017 9:38am
Well shit! They only sell Sunoco. I had no idea it had ethynol in it. Always ran the 110 and never had any issues. The VP stuff will have to come from a bike shop....and Christ...how much is that for 5 gallons? I'm not running nationals here..just a vet weekend warrior.
mxb2
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mxb2 3/16/2017 9:40am
3/16/2017 9:40am
jeffro503 wrote:
Well shit! They only sell Sunoco. I had no idea it had ethynol in it. Always ran the 110 and never had any issues. The VP...
Well shit! They only sell Sunoco. I had no idea it had ethynol in it. Always ran the 110 and never had any issues. The VP stuff will have to come from a bike shop....and Christ...how much is that for 5 gallons? I'm not running nationals here..just a vet weekend warrior.
VP t2,. No mixing, decent price. Quality product.
Jmicmoto13
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Jmicmoto13 3/16/2017 9:44am
3/16/2017 9:44am
Lots of good info here. I love these topics. One can learn a lot.
Skidaddle
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Skidaddle 3/16/2017 9:45am
3/16/2017 9:45am
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines.

People buying high dollar fuel for virtually stock bikes. Why? If its not detonating or pinging, there is no need.
rrjr
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rrjr 3/16/2017 12:28pm
3/16/2017 12:28pm Edited Date/Time 3/16/2017 12:38pm
Skidaddle wrote:
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines. People buying high dollar fuel for virtually stock bikes...
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines.

People buying high dollar fuel for virtually stock bikes. Why? If its not detonating or pinging, there is no need.
You can run pure ethanol or methanol in a 2 stroke.

Is that what you run in your snowmobile?

If you're riding a bike that is pinging and having detonation issues it's usually too late. That's why you run good fuel.
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Skidaddle
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Skidaddle 3/16/2017 12:43pm
3/16/2017 12:43pm Edited Date/Time 3/16/2017 12:51pm
Skidaddle wrote:
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines. People buying high dollar fuel for virtually stock bikes...
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines.

People buying high dollar fuel for virtually stock bikes. Why? If its not detonating or pinging, there is no need.
rrjr wrote:
[i][b]You can run pure ethanol or methanol in a 2 stroke.[/b][/i] Is that what you run in your snowmobile? If you're riding a bike that is...
You can run pure ethanol or methanol in a 2 stroke.

Is that what you run in your snowmobile?

If you're riding a bike that is pinging and having detonation issues it's usually too late. That's why you run good fuel.
Nope. Fuel mileage would be shit. But those blaming oxygenated fuel for their engine problems are looking in the wrong place.

Most can simply get more performance by twisting the right grip further with plain old 91. Ever seen how a 65 can blow past a 450?



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kzizok 3/16/2017 12:48pm
3/16/2017 12:48pm Edited Date/Time 3/16/2017 12:48pm
jeffro503 wrote:
Well shit! They only sell Sunoco. I had no idea it had ethynol in it. Always ran the 110 and never had any issues. The VP...
Well shit! They only sell Sunoco. I had no idea it had ethynol in it. Always ran the 110 and never had any issues. The VP stuff will have to come from a bike shop....and Christ...how much is that for 5 gallons? I'm not running nationals here..just a vet weekend warrior.
Go to a VP gas station. You can get race gas there. It differs and you may have to call around. Additionally, I also bet there are gas stations around for high-end/exoctics that you can get what you want from the pump. Weve got one with pay at the pump, and choose which one you want. Much more reasonible options too.
Travis_Hudson
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Travis_Hudson 3/16/2017 12:58pm
3/16/2017 12:58pm
Mrxo2 all the way........I did run VPR at one point, it ran pretty well.
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JAFO92 3/16/2017 1:08pm
3/16/2017 1:08pm Edited Date/Time 3/18/2017 7:25am
Skidaddle wrote:
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines. People buying high dollar fuel for virtually stock bikes...
You can run pure ethanol or methanol in a 2 stroke. The fuel doesnt blow up engines.

People buying high dollar fuel for virtually stock bikes. Why? If its not detonating or pinging, there is no need.
.
bsharkey
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bsharkey 3/16/2017 1:08pm
3/16/2017 1:08pm Edited Date/Time 3/16/2017 1:15pm
jeffro503 wrote:
I will call them here at about 9am when they open , but I think they only sell Sunoco. The standard 110 was like $47.90 for...
I will call them here at about 9am when they open , but I think they only sell Sunoco. The standard 110 was like $47.90 for a 5 gallon can if I remember right. The Mo2X stuff is what I was looking at , and they have in their description that it's really good for 2 stroke racing motors. But wanted some input from you guys on weather it's worth the extra cost. Better performance can be noticed ect....
jeff we ran VP mrx02 in our tom morgan built full mod national bike.i tried mo2x Sunoco also it was quite a bit cheaper at $90-100 FOR 5 GALLONS. personally I liked the vp better and it was a noticable difference between that an straight c12 the cost difference is a lot. Bent lever motorsports isn't far from where you live and they will give you the best price but its still $155 for 5 gals. we went up 2 full main sizes and one on the clip and she ran great. one more thing make sure you store it in a metal can. it will lose the oxy content thru evaporation. we always drained the tank and put it back in the metal container after each time we rode. also this gas smells like nothing you have ever used. I put all the containers in our shed.
floridaflash
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floridaflash 3/16/2017 2:13pm
3/16/2017 2:13pm
there are some tricks to get all of the performance out of O2 fuels, you can go way up on your jetting and create more power, it takes some playing with but can be done. On a 2005 YZ 125 I built for my son I ran a 495 main, nobody believed me when I told them what I was running.
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Dtat720 3/16/2017 2:26pm
3/16/2017 2:26pm
floridaflash wrote:
there are some tricks to get all of the performance out of O2 fuels, you can go way up on your jetting and create more power...
there are some tricks to get all of the performance out of O2 fuels, you can go way up on your jetting and create more power, it takes some playing with but can be done. On a 2005 YZ 125 I built for my son I ran a 495 main, nobody believed me when I told them what I was running.
Thats what i was going to say. To get max performance out of oxy fuels you have to richen your jetting by the percentage of oxygen you are introducing with the fuel. Running the same jetting with oxy fuel as you do with regular fuel creates a super lean condition.
Braap19
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Braap19 3/16/2017 6:45pm
3/16/2017 6:45pm
floridaflash wrote:
there are some tricks to get all of the performance out of O2 fuels, you can go way up on your jetting and create more power...
there are some tricks to get all of the performance out of O2 fuels, you can go way up on your jetting and create more power, it takes some playing with but can be done. On a 2005 YZ 125 I built for my son I ran a 495 main, nobody believed me when I told them what I was running.
On my mod 125 i ran a 480 main, but it was lean as shit for the entirety​ of that bike
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NorcalVet 3/16/2017 7:50pm
3/16/2017 7:50pm
Another plus... same bike '05 rm 250. Oem piston / pc / jetting is dialed / v3 w/ 927 @ 32-1
(Runs crisp and clean- no spooge)

For the Sunoco 110 leaded "purple"

I buy it by the gallon as needed from a local race car/ fab shop about 5 miles away
- about 8.50 gal + tax

I buy extra as a treat for my classic w/ 11-1's and solid lifters
-- it sounds and runs so much better then 92 plus Cool
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ruskymx 3/16/2017 8:27pm
3/16/2017 8:27pm
mmmmm.....race fuel and premix



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blackdiamond 3/16/2017 9:36pm
3/16/2017 9:36pm
jeffro503 wrote:
I will call them here at about 9am when they open , but I think they only sell Sunoco. The standard 110 was like $47.90 for...
I will call them here at about 9am when they open , but I think they only sell Sunoco. The standard 110 was like $47.90 for a 5 gallon can if I remember right. The Mo2X stuff is what I was looking at , and they have in their description that it's really good for 2 stroke racing motors. But wanted some input from you guys on weather it's worth the extra cost. Better performance can be noticed ect....
MRXO2 rocks and is easily the best two stroke rocket fuel but it is really expensive (most oxy fuels are not cheap)

A good all around compromise would be U4.4, not as much oxygen as MRXO2 but it's much more affordable.

MR12 is far too low octane for a "tuned" two stroke. It will detonate itself to death in 5 laps if it has any compression at all.
CarlinoJoeVideo
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CarlinoJoeVideo 3/16/2017 9:40pm
3/16/2017 9:40pm
I'm running 50/50 VP c12 and 91 pump in my 16 KTM 125.

C12 at 40:1
91 pump at 60:1

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