WHAT GRADE FUEL ARE YOU BURNING????

No way you filling up at Sams without a tanker refilling, lol.

 

100 octane non ethanol here in Las Vegas lol

 

Top tier 87 non ethanol.

 

JP8

 

I have used regular with no issues.

 

I always run 89 Chevron Plus

https://www.chevronwithtechron.ca/p...n't benefit from the quality of Chevron fuels.

 

I have a 2006 Honda Ridgeline. The manual said to put in premium if towing. I was bringing the Chevy to NJMS and put premium in on the way down. I made it down in one tank. One the way up I had to refill and I put regular. I had to stop for a refill. My assumption is the truck has a knock sensor. When it senses knock in the engine it retards the timing. That knock the bottom end out of your performance and gas mileage.

I tried the same "experiment" with the Tundra. I saw no difference in MPG or performance.

On of our past memember is a Shell engineer. This is what he said:

"Hi, there is potentially more but more likely different detergents. It’s all about cost. My recommendation would be to buy and additive and not use the premium. You’re wasting your money as your engine is designed for regular. Premium is harder to combust, higher octane, harder to combust. When it does combust, bigger explosion=more power. That’s why avgas and stuff is 102-104 Octane, or somewhere around there. If you don’t want to buy and additive then the premium is ok but I wouldn’t do that too much. It’s extra strain on your engine and you may end up with more gunk on your cylinders since you can’t combust all of it. Feel free to post."

 

Before the Harrop:
I ran 87 for the 1st 20k miles. then tried the 93 octane. no difference in mileage or perceived power.

After the Harrop:
I run 93 octane. the dyno told me it was not on the knock sensors. (confirming Harrop's study)
For 1 tank, I did bump the octane to 95-ish, with royal purple (MMT). I felt no difference. although, the rear tires no longer like me.

my next quasi-scientific study will be ethanol-free gas via Buccee's.

 

Running the magnuson along with being a flex fuel truck I use 93 when i can and will never use ethanol.
Find 93 Octane Gas: Locate Gasoline Stations Selling Premium
Ethanol-free gas stations in the U.S. and Canada (pure-gas.org)

 

Highest octane available for all 90k.

 

There's a dirty little convenience store not too far from me, they always have sold nondescript gas that comes from a nearby distributer, it appears to be the same company's truck every time they refill their tanks. Lo and behold, about 2 months ago, up went the Exxon signs and branding on the pumps, along with top tier gas stickers. The same fuel truck is still showing up to replenish the tanks.

 

At $5 in California the cheapest crap I can find.

 

87 from day one. It is a truck. It does not need anything higher than that.

 

I wish my truck ran on crap....no worries ever, always seem to have enough.

 

I've run 85 here in Colorado on all 4 of the tundras I've owned. Never had a problem.