Gas for 200t, does it really need premium?
Thread Starter
Pole Position
Joined: Apr 2016
Posts: 222
Likes: 7
From: FL
Gas for 200t, does it really need premium?
It's about time for my first fill up and was wondering if I really need to put 93 in it. I put 89 in my 5.7 HEMI and it ran like a beast. Anyone having issues running anything less than 93?
Lexus Champion
Joined: Oct 2015
Posts: 2,424
Likes: 192
From: CA
your 5.7L Hemi recommended 89 if you read the manual (I'm a former Chrysler ASE tech)
your 200T requires >91.
general rule of thumb, high compression, high rev motors need high octane fuel for better combustion.
low compression motors do not.
your 200T requires >91.
general rule of thumb, high compression, high rev motors need high octane fuel for better combustion.
low compression motors do not.
Trending Topics
Pole Position
Joined: Nov 2014
Posts: 227
Likes: 18
From: Florida
In a turbo’d car, when boosting, does compression ratio rise or stay the same? During the intake stroke more and faster compressed air is pushed in so comparing lower RPM’s to higher RPM’s, I just wonder if it’s the same 10.0:1 compression ratio stated on Lexus’ website at for example 2,000 RPM would remain the same at, say, 5000 RPM. Anyone know?
Lexus Test Driver
Joined: Dec 2006
Posts: 1,509
Likes: 6
From: NT
In a turbo’d car, when boosting, does compression ratio rise or stay the same? During the intake stroke more and faster compressed air is pushed in so comparing lower RPM’s to higher RPM’s, I just wonder if it’s the same 10.0:1 compression ratio stated on Lexus’ website at for example 2,000 RPM would remain the same at, say, 5000 RPM. Anyone know?
Use the highest octane possible in gas turbo cars.
Rookie
Joined: Jul 2015
Posts: 72
Likes: 2
From: Arizona
you bought a premium brand, gotta put in that premium fuel. do it because the owners manual recommends it. if you put in lower octane, it won't kill the car but it will knock and lower power due to the detonation.
Lexus Champion
Joined: Oct 2015
Posts: 2,424
Likes: 192
From: CA
actually the ECU will pull timing resulting in lower power and as a result IF something were to happen to the motor and Lexus reviews the ECU they will know that lower than recommended octane was used and they can deny warranty coverage.
I don't understand the logic of people, the difference (at least around here) between 87 and 91 octane is 20 cents, (10 cents between 89 and 91) for a full tank in my RCF that relates to a difference of $2.80, are people really that hard up for $3?
most people spend more than $3 on a cup of coffee, a pack of cigarettes, hell a damn beer at a bar.
you spend north of $40,000 for a premium brand/model car and then balk @ spending an extra $3.00 for the fuel per tank?
Lexus Test Driver
Joined: Jan 2007
Posts: 7,460
Likes: 232
From: CA
Originally Posted by mjeds
actually the ECU will pull timing resulting in lower power and as a result IF something were to happen to the motor and Lexus reviews the ECU they will know that lower than recommended octane was used and they can deny warranty coverage.
I don't understand the logic of people, the difference (at least around here) between 87 and 91 octane is 20 cents, (10 cents between 89 and 91) for a full tank in my RCF that relates to a difference of $2.80, are people really that hard up for $3?
most people spend more than $3 on a cup of coffee, a pack of cigarettes, hell a damn beer at a bar.
you spend north of $40,000 for a premium brand/model car and then balk @ spending an extra $3.00 for the fuel per tank?
I don't understand the logic of people, the difference (at least around here) between 87 and 91 octane is 20 cents, (10 cents between 89 and 91) for a full tank in my RCF that relates to a difference of $2.80, are people really that hard up for $3?
most people spend more than $3 on a cup of coffee, a pack of cigarettes, hell a damn beer at a bar.
you spend north of $40,000 for a premium brand/model car and then balk @ spending an extra $3.00 for the fuel per tank?
