Shell vs. Chevron gasoline
#46
Have been using Costco premium, last fill up I did regular to see if makes any difference or if there is a loss in economy. It would be nice to pay .40 less per gallon if its not needed. As of yet there is no difference but it may take a few fill ups for any changes to the rich / lean for knocking ect.
#47
Lexus Test Driver
The only time the engine performance would suffer from not having the recommended (higher) octane gasoline is when/if you put the engine under more than a moderate load (e.g. pedal-to-the-metal acceleration, drop-down passing gear, climbing lengthy steep grade hills, etc.). Even then, the engine's knock sensors are designed to retard the engine's timing so no damage is done. However, you would likely feel a pulsating engine response with hesitation when putting the engine under considerable load as the ECU adjusted for the less than recommended octane rating gasoline.
#49
Driver School Candidate
Join Date: Mar 2019
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Dear Nick:
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
#50
Lexus Test Driver
Dear Nick:
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
What is a MX 350?
Do you realize that the last post in this thread (before you made your post) was 39 months ago?
#51
Dear Nick:
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
#52
Lexus Test Driver
#53
Pole Position
Dear Nick:
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
I always revert back to two MIT graduates that are car mechanics who had a syndicated radio show called Car Talk for 35 years.
http://www.cartalk.com/content/premi...egular-0#myth4
From the USA Today:
The only modern engines that should really need premium are those with superchargers, which force-feed fuel into the cylinders. "You're driving along and just tramp the gas and the knock sensor cannot sense the knock fast enough in some cases," because the supercharger boosts pressure so fast, says Bob Furey, chemist and fuels specialist at General Motors.
Burning regular when the owner's manual specifies premium won't void the warranty, nor damage the engine, even the most finicky automakers say. "You're giving up perhaps just a little bit of performance that a customer wouldn't really even notice, it's so slight," says Furey.
#54
Lexus Test Driver
I'm still waiting for someone to tell me what a 2010 MX 350 is...
#56
Instructor
there both great shell is terrific and so is chevron
any issues with shell are gas station location issues with bad fuel
and for all with the the 87
i have a loaner that i filled with 87 because was on highway and it runs crappy on 87 and good on premium
i haven't seen what the difference is in mpg but its usually 5% for that
i would run premium the way this thing is running with regular is a huge difference not in a good way
any issues with shell are gas station location issues with bad fuel
and for all with the the 87
i have a loaner that i filled with 87 because was on highway and it runs crappy on 87 and good on premium
i haven't seen what the difference is in mpg but its usually 5% for that
i would run premium the way this thing is running with regular is a huge difference not in a good way
#57
#58
Dear Nick:
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
You're a Lexus Test Driver, so this is very helpful information. A few followups: are you suggesting that it doesn't matter what octane gas we use in our Lexuses, or just that E10 is no better or worse for the engine than "real gas" is?
I have always wondered if 87 octane E10 was harmful, compared to the "recommended" 91 octane E10.
What type of gas would you use in your own 2010 MX 350?
Welcome to the ClubLexus (CL). Nick (NickTee) is not a real Lexus test driver, lol.
"Lexus Test Driver" is one of the many forum titles that is automatically assigned to users based on how many posts they have made. Others include:
- Rookie
- Lead Lap
- Pole Position
- Lexus Champion
- etc
~ Im2bz2p345
Last edited by Im2bz2p345; 03-07-19 at 01:55 PM.
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