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Old 04-29-2020, 04:08 PM   #16 (permalink)
Tahoe_Hybrid
Master EcoModder
 
Join Date: May 2019
Location: California
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Tahoe 2020 - '08 Chevy Tahoe H
90 day: 20.75 mpg (US)
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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.





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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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