Gas for 200t, does it really need premium?
04-14-16, 03:30 PM
#1
Pole Position
Thread Starter
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?
04-14-16, 04:24 PM
#5
Lexus Champion
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.
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04-14-16, 07:31 PM
#8
Pole Position
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?
04-14-16, 09:30 PM
#11
Lexus Test Driver
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.
04-14-16, 10:54 PM
#12
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.
04-15-16, 09:48 AM
#13
Lexus Champion
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?
04-15-16, 10:00 AM
#14
Lexus Test Driver
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?
