Gas quality and preferences
#41
Instructor
when I put in Petro's Ultra 94 no ping at all and poor gas mileage. I switched to Shell 91 and this time tried a brand new gas station and the car pings on initial acceleration and better gas mileage. Now I am wondering which gas to use in terms of better engine life?
Last edited by the_razor; 12-07-2014 at 10:16 AM.
#43
Senior Moderator
Ethanol has higher octane but lower power output for the amount used in the combustion process hence worse gas milage if the fuel was 11-14% ethanol.
#44
Intermediate
![Smile](https://acurazine.com/forums/images/smilies/smile.gif)
The computer will retard the timing as necessary for (slightly) lower octane to prevent knock. As long as you fill it up with premium the engine should be ticking like a Swiss watch for many years to come.
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#45
Instructor
I am going to try with full tank of Petro 94 and see what my range is. How does our engine behave with this ethanol I wonder? Will 94 leave more carbon than 91 or vice versa?
#46
i filled up with shell the first two times i got gas and i had hesitation from 0 mph sluggish start. i switched to mobile and other gas stations and have had zero problems.
#49
Racer
Thread Starter
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Georgiey22 (01-02-2015)
#51
Racer
Thread Starter
best ive seen was 32mpg from a 60mile round trip from east stroudsburg pa forgot what my psi was maybe 35 all around stock wheels by the way
i dont remember if i had the cc on or foot on the peddle this was again "Hess" gas.
#53
Advanced
I don't believe ethanol does anything bad to the engine, it actually keep the head cleaner. E85 is used in many vehicles in USA, I remember the tuner of my previous car who pulled the valve cover of his engine who ran many miles with high-ethanol fuel and it was soo clean.
"Yes ethanol is corrosive, but not very much. Gasoline is corrosive too. Ethanol is biodegradable in water. So it has a tendency to contain and attract water. It is not the corrosive properties of ethanol that can cause damage to your vehicle; it is the water which can rust a vehicle’s fuel system from the inside out. Today’s vehicles (since mid 1980s) have fuel systems which are made to withstand corrosive motor fuels and rust from water. Also today’s distilling processes are superior to way back when. We now have better techniques for drying out ethanol or reducing the water content.
On side note, gas contains water too. Ever hear of dry gas?"
"Yes ethanol is corrosive, but not very much. Gasoline is corrosive too. Ethanol is biodegradable in water. So it has a tendency to contain and attract water. It is not the corrosive properties of ethanol that can cause damage to your vehicle; it is the water which can rust a vehicle’s fuel system from the inside out. Today’s vehicles (since mid 1980s) have fuel systems which are made to withstand corrosive motor fuels and rust from water. Also today’s distilling processes are superior to way back when. We now have better techniques for drying out ethanol or reducing the water content.
On side note, gas contains water too. Ever hear of dry gas?"
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the_razor (12-26-2014)
#54
On my 3.5L FWD running Mobile 1 oil and Chevron 91 octane and I took a drive to San Diego which was 195 miles round trip and got 33MPG. This varies based on driving however I was doing 70MPH with OEM 18" Michelins. Stop and go driving in traffic is dramatically different.
#55
Cruisin'
I try to stick with 93 or 94 octane in both my TL and RDX. The TL SH-AWD gets an average of about 22mpg. 27mpg in the RDX AWD.
I find both are pretty good for being V6's and AWD. My 2012 Jeep i traded in for the RDX, when it wasn't broken, use to be around 16mpg.
I find both are pretty good for being V6's and AWD. My 2012 Jeep i traded in for the RDX, when it wasn't broken, use to be around 16mpg.
#58
OP, I used to be like all these guys on here being very specific with the gas companies I use... After 2 kids, 2 car payments, and a mortgage later I just pump whatever is cheaper Costco, Shell, Chevron, 76, Safeway, Fred Meyers. As long as its 91 and not some small Bob's Corner Store and gas.
#59
Racer
Thread Starter
OP, I used to be like all these guys on here being very specific with the gas companies I use... After 2 kids, 2 car payments, and a mortgage later I just pump whatever is cheaper Costco, Shell, Chevron, 76, Safeway, Fred Meyers. As long as its 91 and not some small Bob's Corner Store and gas.
#61
Racer
Thread Starter
#62
Team Owner
![Tongue](https://acurazine.com/forums/images/smilies/tongue.gif)
It seems this report was more about brand recognition and perception, more than anything else.
#63
Shell 93 for me as well.
#64
Senior Moderator
Get your valves adjusted
I find it hard to believe that you, or any 4G pings on shell. If your engine was constantly pinging on brand X gas, there'd be a whole hell of a lot of failing engines. Premature ignition will end in premature wear, and I haven't heard of many engine failures.
It seems this report was more about brand recognition and perception, more than anything else.
![Tongue](https://acurazine.com/forums/images/smilies/tongue.gif)
It seems this report was more about brand recognition and perception, more than anything else.
#67
I only use Top Tier Fuels. I used to be a Chevron only guy, but have started filling up at Costco more and more. Yes its true that all gas stations in the US have to have some form of additive/cleaner, but they all aren't top tier either. More info at this link.
Top Tier Gasoline
I like the Costco route because it has a ton of traffic, the pumps are all maintained, and heck it's on average 15 cents cheaper than everywhere else.
I wouldn't stress about the ethanol debate if you are driving your car on a consistent basis. However I wouldn't be caught dead putting that ethanol crap in my mower or classic Volvo.
Top Tier Gasoline
I like the Costco route because it has a ton of traffic, the pumps are all maintained, and heck it's on average 15 cents cheaper than everywhere else.
I wouldn't stress about the ethanol debate if you are driving your car on a consistent basis. However I wouldn't be caught dead putting that ethanol crap in my mower or classic Volvo.
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