Race gas VS pump gas

JakeM250R
Profile picture for user JakeM250R
Posts
52
Joined
2/12/2020
Location
USA
JakeM250R
Edited Date/Time 7/21/2020 6:10pm
I'm currently running pump gas in my 2015 crf250r, I'm thinking about switching to race gas, what gas should I run and would it effect my motor switching from pump to race gas
|
Asnep815
Profile picture for user Asnep815
Posts
19
Joined
7/17/2019
Location
USA
Asnep815 7/22/2020 8:57am
7/22/2020 8:57am
if your engine is mainly stock then i would recommend VP's T4 fuel. its a direct pump gas replacement. we've ran it in several of our stock or practice bikes and its always been great! and in terms of cost, it isnt too hard on the wallet either.
5
wrc777
Profile picture for user wrc777
Posts
3223
Joined
5/21/2020
Location
Greenwood, IN, USA
Fantasy
142nd
wrc777 7/23/2020 5:45am
7/23/2020 5:45am
Personal experience with a CRF250RX was that the Sunoco equivalent of VP T4 had better throttle response and the maps all felt the same which I thought was odd because I could tell some difference between them on pump gas (93 octane with up to 10% ethanol around here). The Sunoco 260 GT Plus uses 13% ethanol instead of the MTBE used in T4. I am going to try the same fuel in a KTM 300XC TPI probably this week. I have been running a mix of 90 octane ethanol free and 110 octane leaded ethanol free (both out of pumps) in it which seems to feel the same as pump gas.
Rickyisms 7/23/2020 7:33am
7/23/2020 7:33am
T4 is your best bet for a stock four stroke.
1

The Shop

See All »
240MotorSports 7/26/2020 9:24am
7/26/2020 9:24am
I run the sunoco GT, its 100 octane. You can feel a power difference versus 91. It's only $8 a gallon too.
1
HighPlainsSquid 7/27/2020 6:50am
7/27/2020 6:50am Edited Date/Time 7/27/2020 6:56am
queen of spodes wrote:
You'll feel more power probably. MXA did a nice write up on the different VP race fuels:
https://motocrossactionmag.com/amp/racers-guide-to-the-hierarchy-of-mot…
Nice.... bookmarked.

I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4 times. Race gas would, unfortunately, eat me up budget-wise. Even so... I always gaze enviously at the cans of race gas on my way back from window shopping at Victoria's Secret.

Rickyisms 7/27/2020 12:37pm
7/27/2020 12:37pm
queen of spodes wrote:
You'll feel more power probably. MXA did a nice write up on the different VP race fuels:
https://motocrossactionmag.com/amp/racers-guide-to-the-hierarchy-of-mot…
HighPlainsSquid wrote:
Nice.... bookmarked. I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4...
Nice.... bookmarked.

I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4 times. Race gas would, unfortunately, eat me up budget-wise. Even so... I always gaze enviously at the cans of race gas on my way back from window shopping at Victoria's Secret.

AV gas would be a good alternative for you. Most are around 100 octane and it is very clean and consistent fuel.
1
nascarnate326
Profile picture for user nascarnate326
Posts
3008
Joined
11/3/2014
Location
Charlotte, MI, USA
nascarnate326 7/27/2020 8:05pm
7/27/2020 8:05pm
I used U4.4 in my 2014 CRF250R and noticed a huge difference. It’s not cheap but good fuel is worth it. T4 is good as well.
526
Profile picture for user 526
Posts
1731
Joined
5/4/2009
Location
Colgate, WI, USA
526 7/28/2020 8:36am
7/28/2020 8:36am
queen of spodes wrote:
You'll feel more power probably. MXA did a nice write up on the different VP race fuels:
https://motocrossactionmag.com/amp/racers-guide-to-the-hierarchy-of-mot…
HighPlainsSquid wrote:
Nice.... bookmarked. I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4...
Nice.... bookmarked.

I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4 times. Race gas would, unfortunately, eat me up budget-wise. Even so... I always gaze enviously at the cans of race gas on my way back from window shopping at Victoria's Secret.

Rickyisms wrote:
AV gas would be a good alternative for you. Most are around 100 octane and it is very clean and consistent fuel.
Does AV gas have Lead in it? because you unleaded gas in any modern valve train.
eric513anderson 7/28/2020 2:47pm
7/28/2020 2:47pm
HighPlainsSquid wrote:
Nice.... bookmarked. I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4...
Nice.... bookmarked.

I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4 times. Race gas would, unfortunately, eat me up budget-wise. Even so... I always gaze enviously at the cans of race gas on my way back from window shopping at Victoria's Secret.

Rickyisms wrote:
AV gas would be a good alternative for you. Most are around 100 octane and it is very clean and consistent fuel.
526 wrote:
Does AV gas have Lead in it? because you unleaded gas in any modern valve train.
See I’ve always heard a leaded fuel won’t harm a 4stroke and that the lead is basically a added lubricant?
wrc777
Profile picture for user wrc777
Posts
3223
Joined
5/21/2020
Location
Greenwood, IN, USA
Fantasy
142nd
wrc777 7/28/2020 3:31pm
7/28/2020 3:31pm
HighPlainsSquid wrote:
Nice.... bookmarked. I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4...
Nice.... bookmarked.

I use non-ethanol 91 pump gas in all my bikes 'cause we're at 6500' elevation and go thru at least 5 gallons/week, riding 2-4 times. Race gas would, unfortunately, eat me up budget-wise. Even so... I always gaze enviously at the cans of race gas on my way back from window shopping at Victoria's Secret.

Rickyisms wrote:
AV gas would be a good alternative for you. Most are around 100 octane and it is very clean and consistent fuel.
526 wrote:
Does AV gas have Lead in it? because you unleaded gas in any modern valve train.
The LL stands for low lead. How does the lead content compare to leaded race gas? I don’t know.
HighPlainsSquid 7/28/2020 4:02pm
7/28/2020 4:02pm Edited Date/Time 7/28/2020 4:03pm
I know guys who use AV gas but I never have. There IS an airport in town and I suppose I could give it a try. Does one just drive up to the pump and get it?

BTW.... "town" is 1300 people, 30 miles away. Last summer I just ordered 250 gallons of 91 non-ethanol to one of the ranch gas tanks and that was nice. They can't get it anymore, so I'm looking around for another supplier.

slipdog
Profile picture for user slipdog
Posts
10054
Joined
7/25/2009
Location
Nor Cal, CA, USA
slipdog 7/28/2020 8:58pm
7/28/2020 8:58pm
I run pump gas. When I want to go faster I just twist the throttle further. Works every time... Your results may vary.
1
Matt Fisher 7/28/2020 10:25pm
7/28/2020 10:25pm
Rickyisms wrote:
AV gas would be a good alternative for you. Most are around 100 octane and it is very clean and consistent fuel.
526 wrote:
Does AV gas have Lead in it? because you unleaded gas in any modern valve train.
wrc777 wrote:
The LL stands for low lead. How does the lead content compare to leaded race gas? I don’t know.
AV gas has lead, and by today's standards they have a ton of it, regardless of it's Low Lead name. The lead provides a slight cushioning effect for valve seats, but it's biggest advantage is it's resistance to knock. Safe in 2 or 4 strokes, yes. Really bad for catalytic converters and slowly ruins O2 sensors.

100LL is much better than pump fuel, particularly the ethanol tainted crap. It's not on par with real race gas, but neither is the price.
1
hogkiller
Profile picture for user hogkiller
Posts
191
Joined
8/23/2014
Location
champion, AB, CA
hogkiller 8/2/2020 9:12am
8/2/2020 9:12am
I run pump gas, have since 1970 with no issues No problems ...now live in Alberta Canada gas up here is not like Socal gas
HighPlainsSquid 8/2/2020 5:02pm
8/2/2020 5:02pm
Does 100LL smell good when it burns?
motoxracer17 8/3/2020 10:39pm
8/3/2020 10:39pm
Stop using AV gas for motocross 🤦🏻‍♂️! There are more variables than just an octane number! AV gas is designed for planes which run on much lower rpm rates than dirt bikes and the burn rate of the fuel is much lower. This fuel is not designed for motocross and will NOT burn fast enough for the high reving rpms of motocross. You would be better off running pump gas than an higher octane fuel that wasn’t designed for your application. You will gain the most performance by running the lowest octane possible without detonation. In general 93 ish pump gas is going to be the best option without the addition of modifications such as a high compression piston or modified head in which you would need an higher octane fuel to prevent detonation and even then you would need something with a different burn rate and additives than AV gas.
3

Pit Row

See All »
motoxracer17 8/3/2020 10:47pm
8/3/2020 10:47pm
JakeM250R wrote:
I'm currently running pump gas in my 2015 crf250r, I'm thinking about switching to race gas, what gas should I run and would it effect my...
I'm currently running pump gas in my 2015 crf250r, I'm thinking about switching to race gas, what gas should I run and would it effect my motor switching from pump to race gas
Try to find a good source of ethanol free fuel. I currently run a 50/50 mix of VP u4.4 and 92 ethanol free fuel. It gets me pretty close to 100 octane and keeps the oxygen content lower than the VP T4 which sometimes can cause some backfire pop. I can buy the 92 ethanol free for about $3.20 per gallon and a 5 gallon pail of u4.4 for close to $100 bringIng the per gallon price to around $11.60 per gallon which is cheaper than T4.
Matt Fisher 8/4/2020 12:21pm
8/4/2020 12:21pm
motoxracer17 wrote:
Stop using AV gas for motocross 🤦🏻‍♂️! There are more variables than just an octane number! AV gas is designed for planes which run on much...
Stop using AV gas for motocross 🤦🏻‍♂️! There are more variables than just an octane number! AV gas is designed for planes which run on much lower rpm rates than dirt bikes and the burn rate of the fuel is much lower. This fuel is not designed for motocross and will NOT burn fast enough for the high reving rpms of motocross. You would be better off running pump gas than an higher octane fuel that wasn’t designed for your application. You will gain the most performance by running the lowest octane possible without detonation. In general 93 ish pump gas is going to be the best option without the addition of modifications such as a high compression piston or modified head in which you would need an higher octane fuel to prevent detonation and even then you would need something with a different burn rate and additives than AV gas.
I've run Av gas in everything from KX65's to CR500's. Ran it last weekend in my 125SX, and it runs like a top.

The non-ethanol, non-seasonal, long-lasting 100ll fuel works great. Does it work as well as C12? No, but at under $5.00 a gallon it's a worthwhile tradeoff for me. My KTM and my son's CR250 both need more knock resistance than the 91 pump piss offers.

Would 100ll be a good option on a stock TTR110? Nope, the TTR will run better on 87 pump due to the fuel burning quicker than the Av gas does.

So while 100ll is not the ideal fuel for everyone, it is certainly not a bad choice for those not wanting to spend $20 a gallon but need the additional octane. As a benefit, the lack of ethanol helps keeps oil from breaking down and doesn't attack the rubber components in the fuel system.
1

Post a reply to: Race gas VS pump gas