91 or 93/94 Octane for IS500
02-17-22, 02:57 PM
#1
Pit Crew
Thread Starter
91 or 93/94 Octane for IS500
What are owners using in their IS500? My BMW X3M specifically indicated 93 octane was recommended but Lexus only recommends premium 91+
Any benefits to using a slightly higher octane?
Any benefits to using a slightly higher octane?
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Brandonfu (02-17-22)
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Brandonfu (02-17-22)
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Brandonfu (02-19-22)
02-17-22, 06:22 PM
#6
Liquid Bra Champion
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arentz07 (02-18-22)
02-17-22, 08:53 PM
#7
Pit Crew
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02-18-22, 06:57 AM
#8
Unless the Lexus is programmed to advance the timing or something with 93 octane it will provide no benefit. Even if they did it would probably give you 5 hp. I'd use what they tell you to use.
02-18-22, 08:48 AM
#12
02-18-22, 10:08 AM
#13
drives cars
In the US, the manual says 91 is required. These engines are really not meant to run on lower-octane gas long term.
Note, I am talking AKI, not RON.
I suppose a benefit of running 93 (which I do in my IS 350 because 91 is basically impossible to find where I live) is that you make the chance of knock even smaller than it would be with 93. However, you are unlikely to "feel" any performance difference.
Note, I am talking AKI, not RON.
I suppose a benefit of running 93 (which I do in my IS 350 because 91 is basically impossible to find where I live) is that you make the chance of knock even smaller than it would be with 93. However, you are unlikely to "feel" any performance difference.
04-04-22, 11:27 AM
#14
if the cars are tuned for 91octane, the only difference you see with higher octane is a lighter wallet.
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giS (04-05-22)
04-04-22, 11:30 AM
#15
In the US, the manual says 91 is required. These engines are really not meant to run on lower-octane gas long term.
Note, I am talking AKI, not RON.
I suppose a benefit of running 93 (which I do in my IS 350 because 91 is basically impossible to find where I live) is that you make the chance of knock even smaller than it would be with 93. However, you are unlikely to "feel" any performance difference.
Note, I am talking AKI, not RON.
I suppose a benefit of running 93 (which I do in my IS 350 because 91 is basically impossible to find where I live) is that you make the chance of knock even smaller than it would be with 93. However, you are unlikely to "feel" any performance difference.
The following users liked this post:
giS (04-05-22)