AV fuel and big blocks.

[ChrisV]

I got questions everyday. IDGAF if it annoys people.

I plan to put av fuel in the Mach 26. (Teague 800)

Do I need to put any oil additives? Marvel mystery oil or two stroke oil?

Here’s a picture of Import vs Domestic

 

[vstdispatch]

Marvel mystery oil is what I was always told when I ran av gas in my bbc blown Carb deal

 

[OldSchoolBoats]

Call Teague

 

[4Waters]

Call Teague

^^^This^^^

 

[77charger]

Never have added anything to the gas just run it.

 

[ChrisV]

Call Teague

Been calling and asked about couple things. Seemed annoyed.

 

[paradise]

AV gas is leaded for lubrication so I'm not sure why you would want/need to add additional lubrication agents?

 

[ChrisV]

AV gas is leaded for lubrication so I'm not sure why you would want/need to add additional lubrication agents?

Searched deep on the forums and couple people said they added oil. So was really confused. Those threads are also 5-10 year old.

 

[lbhsbz]

Searched deep on the forums and couple people said they added oil. So was really confused. Those threads are also 5-10 year old.

I used to run AV gas in the 13:1 436” SBC in my T-bucket….it made all the rubber fuel lines rock hard after a year or so. Some claim it’s “dry”…whateverthefuck that means….and supposedly a bit of marvel or 2smoke oil makes it “wetter”?

That being said….Parker oil doesn’t sell AV gas anymore, so unless you’re dragging that thing to the airport, you’re gonna have a tough time finding it I think.

They have Sunoco 100 at the pump now.

 

[ChrisV]

I used to run AV gas in the 13:1 436” SBC in my T-bucket….it made all the rubber fuel lines rock hard after a year or so. Some claim it’s “dry”…whateverthefuck that means….and supposedly a bit of marvel or 2smoke oil makes it “wetter”?

That being said….Parker oil doesn’t sell AV gas anymore, so unless you’re dragging that thing to the airport, you’re gonna have a tough time finding it I think.

They have Sunoco 100 at the pump now.

Yeah the “dry” bullshit gets me confused.

I fill the 22 up at the airport so it’s normal for me. Rather not chance it with bad 91 fuel.

 

[wzuber]

I was told the glycogen in the fuel is corrosive and the oils help to combat that. I used to run avgas in my jet boat many years ago and was told it attacks the carb. I always had the carb rebuilt semi-annually and it always ran flawlessly.

 

[OldSchoolBoats]

I used to run AV gas in the 13:1 436” SBC in my T-bucket….it made all the rubber fuel lines rock hard after a year or so. Some claim it’s “dry”…whateverthefuck that means….and supposedly a bit of marvel or 2smoke oil makes it “wetter”?

That being said….Parker oil doesn’t sell AV gas anymore, so unless you’re dragging that thing to the airport, you’re gonna have a tough time finding it I think.

They have Sunoco 100 at the pump now.

He will be in Havasu. AV gas sold at Airport and a couple places in town.

 

[COCA COLA COWBOY]

Dude, you're in San Diego....Go to Dion and Son's in Lakeside. I get F&L 110 for $8/gallon out of the pump. It's good stuff! Tons of drag racing buddy's use it without issue. I have used it in all my boats and my son's motocross bikes.

 

[renodaytona]

When I ran AV gas in my older blower motor I always added a bit of Marvel to the tanks. Kept the fuel lines from degrading.

 

[mattyc]

I got questions everyday. IDGAF if it annoys people.

I plan to put av fuel in the Mach 26. (Teague 800)

Do I need to put any oil additives? Marvel mystery oil or two stroke oil?

Here’s a picture of Import vs Domestic

View attachment 1393712

I'm not certain but I thought 91 was acceptable in those motors. That thing is gonna be thirsty and if you plan on any bit of use, anything other than pump gas will be a pita. Theres a few places that have 100 at the pump also

 

[DarkHorseRacing]

Teague told us Mercury two stoke oil when we needed av gas. Just about a pint per 40 gallons.

But as you have a TCM 800, just 91 will do ya. If you’re concerned about the quality of 91, mix it with some 100.

 

[boatnam2]

Teague told us Mercury two stoke oil when we needed av gas. Just about a pint per 40 gallons.

But as you have a TCM 800, just 91 will do ya. If you’re concerned about the quality of 91, mix it with some 100.

This!

 

[Justsomeguy]

Teague told us Mercury two stoke oil when we needed av gas. Just about a pint per 40 gallons.

But as you have a TCM 800, just 91 will do ya. If you’re concerned about the quality of 91, mix it with some 100.

This seems to be the ticket chris.

 

[ChrisV]

Thanks guys! Y’all the best

 

[Get415]

Been calling and asked about couple things. Seemed annoyed.

Try Darren over at Menace Marine in Castaic. Hes always been more than helpful. On the boards here, cant remember the @

 

[500bbc]

AV gas is leaded for lubrication so I'm not sure why you would want/need to add additional lubrication agents?

It's very dry, I add Marvel.

 

[paradise]

It's very dry, I add Marvel.

Dry in what way? For mechanical lubrication it has far more than pump gas. I'll give you that it is typically less lead than race gas, but no idea where the 'dryness' idea comes from.

 

[papabear639]

Interesting topic, I don't run AV gas in my blower motor in the V-drive but I do run it in my VW bug...not because it needs the octane but because it is ethenol free and doesn't degrade the plastic fuel filter, fuel lines or gum up the carb...the car sits a lot so having regular old pump gas really screws with it. since I've started running AV gas in it I haven't had to mess with the carb, fuel lines or the filter in years and when I jump in it for a breakfast cruise it fires right up and runs...if I let it sit for a couple months with regular fuel I'd have to pull the carb off and clean out the idle jet at the very least. I have a few pilot buddies and they were the ones that turned me on the AV in the bug after complaining about the issues I was having with pump gas. The only real issue they said with AV gas is the lead content which can ad deposits to the valves and foul plugs. They don't ad anything to the fuel in airplanes, not sure why you'd need to ad it in any other case. The lead is actually a lubricant in itself...if anything we should be adding stuff to our pump gas.

pic of the bug because everything is better with pics!

 

[500bbc]

Dry in what way? For mechanical lubrication it has far more than pump gas. I'll give you that it is typically less lead than race gas, but no idea where the 'dryness' idea comes from.

I've always been told it can't have the same additives as standrad fuels due to altitude.

But I only know what I've been told and the fact when I don't add it my o-rings dry out in the barrel valve.

 

[Deano]

I'm no expert, but when Brummett tells me to run a little oil with 100LL in the tank on a turbo deal I do it. Pretty sure he is qualified.

 

[River Dirt 2]

I'm no expert, but when Brummett tells me to run a little oil with 100LL in the tank on a turbo deal I do it. Pretty sure he is qualified.

Exactly

 

[Racey]

Searched deep on the forums and couple people said they added oil. So was really confused. Those threads are also 5-10 year old.

It certainly won't hurt to add some Marvel, but we've never ran it in anything carbed that used AV gas. Mechanical injection stuff it helps keeps the injectors free.

 

[ChrisV]

It certainly won't hurt to add some Marvel, but we've never ran it in anything carbed that used AV gas. Mechanical injection stuff it helps keeps the injectors free.

That makes sense. The info I was looking for. Thank you.

 

[Sharp Shooter]

I like av gas with a little marvel and because av gas has a different gravity it runs a tad leaner.

 

[Luvnlife]

^^^This^^^

Yes this

 

[rrrr]

It certainly won't hurt to add some Marvel, but we've never ran it in anything carbed that used AV gas. Mechanical injection stuff it helps keeps the injectors free.

Klotz Fuel Lube was an IndyCar contingency sponsor for many years. But I don't think it was added to the fuel.

Klotz UpLon Alcohol & Gas Top Fuel Lube with Famous Scent

Anti-wear chemistry greatly reduces wear on valves and valve seats Reduces maintenance by keeping fuel injectors clean Identifiable Klotz red color and racy scent Decreases need to purge the fuel system Lubricates, seals, and extends fuel pump life Reduces fuel pump heat saturation Stabilizes...

klotzlube.com

 

[Luvnlife]

Been calling and asked about couple things. Seemed annoyed.

Start the conversation with a question about swapping up to their 1200

 

[Bigbore500r]

Been calling and asked about couple things. Seemed annoyed.

Did you forget to buy something each time you called?

 

[Justsomeguy]

Did you forget to buy something each time you called?

Yeah chris, gotta buy shirts. Lol

 

[Tank]

We just mix 100 with 91. No additives. Although when the boat gets back to ca 100
Isn’t easy to get and I’ll most likely be running just 91.

 

[Justsomeguy]

We just mix 100 with 91. No additives. Although when the boat gets back to ca 100
Isn’t easy to get and I’ll most likely be running just 91.

Well, that's basically AJ telling you the same chris. I would say you have you answer.

 

[Tank]

Well, that's basically AJ telling you the same chris. I would say you have you answer.

Kinda. He does recommend running additive in it when I run just 91 through it, especially ca 91 because it has ethanol. I just can’t remember what he told me to run in it. Figured I’d find out when it comes time.

But I think as long as you’re not beating up
On it and running it WFO all the time, most newer sub 1100 HP motors can run 91.

 

[Justsomeguy]

Kinda. He does recommend running additive in it when I run just 91 through it, especially ca 91 because it has ethanol. I just can’t remember what he told me to run in it. Figured I’d find out when it comes time.

But I think as long as you’re not beating up
On it and running it WFO all the time, most newer sub 1100 HP motors can run 91.

See. He did tell you what to run. Which I figured he's not going to tell his father in law in correct fuel. Thus, what you run is what AJ would recommend. Obviously an assumption, but a pretty safe one i would say.

 

[Tank]

See. He did tell you what to run. Which I figured he's not going to tell his father in law in correct fuel. Thus, what you run is what AJ would recommend. Obviously an assumption, but a pretty safe one i would say.

Yeah. I mean I’ve had conversations and his advise was not to beat up on
It while running just 91 and to throw some
Additive (can’t remember what) when full tanks. Wasn’t like super “you have to
Do this!” More cautionary like, “it would be a good idea”

He’s actually fine with it running non ethanol 91 solo. I just like to put 100 in it because it just feels like it’s better for the motors. Lol

 

[TimeBandit]

It's funny some airplane guys say you need to add marvel mystery oil when you run car gas.

Airplanes sit for months and months with avgas in the lines and carburetor with zero issues ever. if avgas caused an issue in an internal combustion engine or carburetor airplanes might fall out of the sky.

I would avoid ethanol like the plague but I have no issues running avgas. just keep an eye on spark plugs for lead fouling.

My .02

 

[Bigbore500r]

Yeah. I mean I’ve had conversations and his advise was not to beat up on
It while running just 91 and to throw some
Additive (can’t remember what) when full tanks. Wasn’t like super “you have to
Do this!” More cautionary like, “it would be a good idea”

He’s actually fine with it running non ethanol 91 solo. I just like to put 100 in it because it just feels like it’s better for the motors. Lol

Hell - I want to run 100LL in my chevelle just to keep the carb happy when it sits!

But the real question - how does it smell? Good gas smells gooooooooood

 

[ChrisV]

Kinda. He does recommend running additive in it when I run just 91 through it, especially ca 91 because it has ethanol. I just can’t remember what he told me to run in it. Figured I’d find out when it comes time.

But I think as long as you’re not beating up
On it and running it WFO all the time, most newer sub 1100 HP motors can run 91.

I’m a drag racer.

“If you stay ready, you don’t need to get ready.”

Ya feeeelllll meeeee

 

[lbhsbz]

Cheaper in the long run, if the engine doesn’t require high octane….add a 1 or 2 gallon tank and fill it with non - ethanol whatever….plumb some valves in and while you’re idling into the ramp to pull out for the weekend, switch over to your “good stuff” for storage. That’s what I do with the outboard…sort of….except I just run it outta gas at idle with the fuel disconnect pulled off, then have another one I stick in a can of that weed eater gas from Home Depot….pump the ball till the bowls are full…fire it for a few seconds, shut it down and call it a day.

 

[papabear639]

Hell - I want to run 100LL in my chevelle just to keep the carb happy when it sits!

But the real question - how does it smell? Good gas smells gooooooooood

AVgas smells pretty damn good...I've had more than one person comment on it when pulling into a car show. lol

 

[monkeyswrench]

I like av gas with a little marvel and because av gas has a different gravity it runs a tad leaner.

This is what I was taught. "Pump" gas sits about .750 to .770 (ish, don't know about the "E" bs) Both Av and race gas sit in the .710 to .720 range. Once again though, this is going in the way back machine to the early 2000's...when I had fun stuff. The issue was trying to get it to be the right A/F with carbs. Seems stupid, until you start figuring in the volume of air in relation to how much fuel actually comes through the jets...and that float height changes because the fuel makes the float more buoyant.

Bottom line, I personally never found a dead nuts answer. Maybe if I would have had a dyno and some more brain cells?

 

[SkyDirtWaterguy]

What did the previous owner run in it?

 

[ChrisV]

What did the previous owner run in it?

Av
He also only put three hrs on it the past three years.

 

[monkeyswrench]

Av
He also only put three hrs on it the past three years.

Now that's a shame

 

[Todd Mohr]

Av
He also only put three hrs on it the past three years.

I'm going out on a limb here, I'm guessing that's gonna change a bit.

 

[ChrisV]

I'm going out on a limb here, I'm guessing that's gonna change a bit.

I put 80hrs on the 22 last season. She’s gonna get used and abused.