Sunoco 105 Octane ??

Joined
Aug 18, 1999
Messages
138
Likes
0
#1
Anyone using Sunoco in their YZF or WR250F?

I bought a few gallons today and am going to try it this weekend.

I got the stuff from the same place that Randy Hawkins gets his race gas. The same stuff.

It's blue. I hope it's cool.

------------------
Ivan Liechty
A#1 Annoyance
'01 YZ250F "Piglet"
Spartanburg, SC
 
Joined
Jul 27, 1999
Messages
22,690
Likes
508
Location
Chicago
#2
Ivan - There is no 105 pump octane Sunoco :) If it's Blue and unleaded then it's GT Plus, if it's Blue WITH lead it's Sunoco Supreme. Both should work well in the piglet.


------------------
Rich Rohrich
==

"Wisdom is not a product of schooling but of the life-long attempt to acquire it."
- Albert Einstein
 
Joined
Aug 18, 1999
Messages
138
Likes
0
#3
They said it was 105... I guess it is another. It is blue and unleaded.

I can't wait to try it out.

Yipppeeee....

------------------
Ivan Liechty
A#1 Annoyance
'01 YZ250F "Piglet"
Spartanburg, SC
 
Joined
Apr 9, 2001
Messages
59
Likes
0
#5
I hope you're not expecting any more power out of it -- are you?

------------------
 
Joined
Apr 3, 2001
Messages
30
Likes
0
#6
Guys, it's probably the new Sunoco GT Plus. 104 octane unleaded. Service station guys have a habit of rounding up :)

Look to www.racegas.com for more Sunoco info.

-Joe

------------------
 
Joined
May 8, 2000
Messages
258
Likes
0
#7
I was told that running an octane higher than recommended would burn too slow and cause unburnt fuel to build up as carbon. In some cases as cars or bikes that have an average compression ratio, it can cause a decrease in performance rather than an increase.

Any one have proof of this beening true or false?

------------------
mgorman,
Thumping since 1980
"If the competition is not wasted, the day is"
 
Joined
Aug 18, 1999
Messages
138
Likes
0
#8
Rich has posted several times with many independant references that counter those claims.

IMO, from what I have learned, use race gas under 2 conditions.

1) If your bike needs it. Mine Doesn't.

2) If you can afford it. I can and I want to see what improvements I will notice, if any. Plus Randy Hawkins runs the same stuff :eek:

There are some enhancements to race gas but you have to jet for it. The consistency of the grade is better then pump. However, guys like me rarely notice the difference :)

------------------
Ivan Liechty
A#1 Annoyance
'01 YZ250F "Piglet"
Spartanburg, SC
 
Joined
Jul 13, 2000
Messages
58
Likes
0
#9
Let me say first that I am NOT a expert on fuels. I run Sunoco in my YZ250F and I can tell you it does run better when I do so. I've gone with straight pump, straight Sunoco, and a combination of each mixed together. By far, running total race gas works the best for my bike, where I live. That's the truth. :)

Dash
 

vw

Member
Joined
Dec 13, 2000
Messages
1
Likes
0
#10
I tries VP C12 in my new yz250f and if was not good. The dike did not have the pull that the 93 or 94 pump does. Maybe I got bad gas but after my experience pump gas is WAY better.
 
Joined
Feb 16, 2001
Messages
46
Likes
0
#11
Rich Rohrich, I know from previous posts, you seem very knowledgeable on race fuels. We presently use VP C-11 in our 250F on race days and pump gas for practice and no jetting changes. The throttle resonse is so much better with the C-11 as well as the overall feel of the motor. I'm curious about the VP MR-2 that the factory guys run. I can get it from the same distributor at the high cost of $11/gallon. It's one of VP's oxygenated fuels and is said to actually increase horsepower as well as throttle response. If I used this fuel, it would only be on race days (too expensive for all the time). My questions are can you give me some insight on the increased horsepower claims, and from your experience,will I need to jet differently when switching back and forth from MR-2 to pump gas. Thanks in advance for your answers. If there is anyone else that has any experience with the VP MR2 please comment. Thanks!!

------------------
 
Joined
Jul 27, 1999
Messages
22,690
Likes
508
Location
Chicago
#12
Switching from C11 to MR2 will require a much richer setup to accomodate the additional oxygen with MR2. There is no arguement that oxygenated fuels can make more power and the response across the board is improved with their use. In many cases you can run less ignition advance with the oxy fuels which tends to provide a small power increase as well, although at this point I can't verify if that is the case on the 250F. Switching between those two fuels would be a pretty big hassle unless you regualrly pull the carb as part of your maintenance schedule. I have reason to believe that Phillips B35 (oxy) may burn a bit quicker than MR2 and may be a better choice if you spend a lot of time high in the rev range. I hope to get a chance to test that notion on Pokie's 250F in the coming weeks.



------------------
Rich Rohrich
==

"Wisdom is not a product of schooling but of the life-long attempt to acquire it."
- Albert Einstein
 
Joined
Aug 18, 1999
Messages
138
Likes
0
#13
My wife will also be riding her 1986 SP125 around. Should I just get some pump for her or will it be ok with the GT Plus?

------------------
Ivan Liechty
A#1 Annoyance
'01 YZ250F "Piglet"
Spartanburg, SC
 

Lemming

Looking for single women!
Joined
Jan 19, 2000
Messages
579
Likes
0
#14
Ivan,

What does that run you a gallon?

------------------
Tim, '99EC200, '01TXT200
 
Joined
Jul 27, 1999
Messages
22,690
Likes
508
Location
Chicago
#15
Ivan - The Sunoco won't hurt the SP, but it seems silly to waste the money when your wife will never know the distance. Just get some pump gas and add a little stabilizer to it so you don't have to think about .

------------------
Rich Rohrich
==

"Wisdom is not a product of schooling but of the life-long attempt to acquire it."
- Albert Einstein