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Old 04-29-2020, 10:21 AM   #11 (permalink)
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Quote:
Originally Posted by Piotrsko View Post
Hate to tell you this but AVGAS is heavily leaded, will clog a cat in one tankfull. Probably the same for race gas, but I'm otherwise qualified.
Oopsie...

I forgot about that...

My bad...




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Old 04-29-2020, 12:42 PM   #12 (permalink)
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Originally Posted by redneck View Post
Oopsie...

I forgot about that...

My bad...




>
Thing is higher octane does not necessarily increase economy.

In fact diesel increases economy In part due to more BTUs

If the op is truly only going for only max fuel economy she could do this

https://ecomodder.com/forum/showthre...ine-11163.html

If that is done I would recommend mixing it with the 90efree, because modern diesel is lower sulphur than gas the emissions are lower as well.

Again would be an interesting experiment
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Old 04-29-2020, 01:53 PM   #13 (permalink)
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Quote:
Originally Posted by Piotrsko View Post
Hate to tell you this but AVGAS is heavily leaded, will clog a cat in one tankfull. Probably the same for race gas, but I'm otherwise qualified.
not if you buy unleaded 100 octane very expensive like 240$ to fill up a 24.5 gallon tank
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Old 04-29-2020, 01:59 PM   #14 (permalink)
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Quote:
Originally Posted by rmay635703 View Post
Thing is higher octane does not necessarily increase economy.
Not if the higher octane is running on summer fuel it's easy to tell if the 91/93 is on summer fuel still as the price will be 20/30 cents more then 87 octane


i.e 87 is 2.599 gallon while 89 and 91 is 2.799/2.899

summer fuel normally nets 2-3mpg more then winter fuel..

example Costs;

(city/highway)
2.599 18.5MPG
0.1404864864864865/miles

91octane 23mpg city
2.899
0.1260434782608696

27-31.2MPG
0.107 to 0.092 per mile.

would you rather pay more up front OR pay more per mile?

using 87 octane cost $3.22 per 23 miles in the city per gallon
using 87 octane costs 3.78-4.36 on the highway per gallon



18.5 is the confirmed mpg which others get with "87 octane"

Last edited by Tahoe_Hybrid; 04-29-2020 at 02:08 PM..
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Old 04-29-2020, 02:22 PM   #15 (permalink)
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Quote:
Originally Posted by rmay635703 View Post
Thing is higher octane does not necessarily increase economy.

In fact diesel increases economy In part due to more BTUs

If the op is truly only going for only max fuel economy she could do this

https://ecomodder.com/forum/showthre...ine-11163.html

If that is done I would recommend mixing it with the 90efree, because modern diesel is lower sulphur than gas the emissions are lower as well.

Again would be an interesting experiment
I never said a higher octane number would... https://ecomodder.com/forum/showthre...tml#post622623

I forgot about them containing lead...


Come to find out they make unleaded race fuel...

https://www.sunocoracefuels.com/fuels

This particular one has a high btu. value.

https://www.sunocoracefuels.com/fuel/optima

Adding diesel fuel to gasoline will lower the octane number possibly below which the PCM is able to adjust timing for thus decreasing efficiency and increasing pollutants.

Like I said it has everything to do with the additive package. Shell makes a premium gasoline that is sold at the pump called “V power + nitro” that contains an advanced additive package.

https://www.shell.us/motorist/shell-...-gasoline.html

I would try the Shell V-power + Nitro.

It’s the least expensive and easiest to purchase.





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Old 04-29-2020, 04:08 PM   #16 (permalink)
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Quote:
Originally Posted by redneck View Post
I never said a higher octane number would... https://ecomodder.com/forum/showthre...tml#post622623

I forgot about them containing lead...


Come to find out they make unleaded race fuel...

https://www.sunocoracefuels.com/fuels

This particular one has a high btu. value.

https://www.sunocoracefuels.com/fuel/optima

Adding diesel fuel to gasoline will lower the octane number possibly below which the PCM is able to adjust timing for thus decreasing efficiency and increasing pollutants.

Like I said it has everything to do with the additive package. Shell makes a premium gasoline that is sold at the pump called “V power + nitro” that contains an advanced additive package.

https://www.shell.us/motorist/shell-...-gasoline.html

I would try the Shell V-power + Nitro.

It’s the least expensive and easiest to purchase.





>
I have had bad luck with Shell stations giving me 87 octane at the 91 pumps at 4 different locations...this also happen at 3 Arco stations as well..

that is why i fill up only at Chevron or Mobil stations
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Old 04-29-2020, 05:08 PM   #17 (permalink)
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Quote:
Originally Posted by Tahoe_Hybrid View Post
Not if the higher octane is running on summer fuel it's easy to tell if the 91/93 is on summer fuel still as the price will be 20/30 cents more then 87 octane


i.e 87 is 2.599 gallon while 89 and 91 is 2.799/2.899

summer fuel normally nets 2-3mpg more then winter fuel..

example Costs;"
Around here

87e10 -$0.95
87e0 - $1.25
88e15- $0.92
91e10- $1.65

I don’t think the op is worried about cost,
Also the thread pointed to someone who used diesel in his gasoline truck for many years without issue besides higher fuel economy

Generally smaller amounts of modern diesel in gas will not have any detectable affect on emissions .

In the 80’s you could buy mileage master gas that had diesel mixed in right at the pump.
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Old 04-29-2020, 05:10 PM   #18 (permalink)
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.

Additive packages


Shell V-Power + Nitro - friction modifier and detergent

https://www.shell.us/motorist/shell-...-gasoline.html


TEXACO with Techron - detergents

https://www.texaco.com/fuels


BP with Invigorate® - detergents

https://www.bp.com/en_us/united-stat...ces/fuels.html


Sunoco with UltraTech™ - detergents

https://www.sunoco.com/quality-fuels


Top Tier Gasoline

https://www.consumerreports.org/car-...h-extra-price/


These companies should be paying me...


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Old 04-29-2020, 06:41 PM   #19 (permalink)
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Quote:
Originally Posted by redneck View Post
.

Additive packages


Shell V-Power + Nitro - friction modifier and detergent

https://www.shell.us/motorist/shell-...-gasoline.html


TEXACO with Techron - detergents

https://www.texaco.com/fuels


BP with Invigorate® - detergents

https://www.bp.com/en_us/united-stat...ces/fuels.html


Sunoco with UltraTech™ - detergents

https://www.sunoco.com/quality-fuels


Top Tier Gasoline

https://www.consumerreports.org/car-...h-extra-price/


These companies should be paying me...


>
Mobil/ Exxon is also top tier
Techron is also available from Chevron

Shell got sued anwhile back for false claims


chris fix leaked out that they use 7x the additive in the premium fuel

typically that is a closely guarded trade secret other wise it would get to the point were it's 100% fuel additive LOL

Last edited by Tahoe_Hybrid; 04-29-2020 at 06:50 PM..
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Old 04-30-2020, 12:57 PM   #20 (permalink)
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Quote:
Originally Posted by rmay635703 View Post
Around here

87e10 -$0.95
87e0 - $1.25
88e15- $0.92
91e10- $1.65

I don’t think the op is worried about cost,
Also the thread pointed to someone who used diesel in his gasoline truck for many years without issue besides higher fuel economy

Generally smaller amounts of modern diesel in gas will not have any detectable affect on emissions .

In the 80’s you could buy mileage master gas that had diesel mixed in right at the pump.
i would not use it in a newer car your just asking for trouble... 1% biodiesel caused some pretty bad damage..

https://web.archive.org/web/20150111...and-myths.html

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