Top Tier Gas
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Top Tier Gas
If this was discussed in the past,please excuse me.I'm on this forum now for a week or so.
I use Shell 93 octane on my Wife's new IS-250-AWD. It seems to be a good match for the engine. Does anyone get great performance from any other brand of fuel? I see that Lexus recommends 91 octane, but has anyone tried mid grade 89 octane?
I realize it's probably not good for the knock sensor to use regular 87 octane.
Just wondering.
I use Shell 93 octane on my Wife's new IS-250-AWD. It seems to be a good match for the engine. Does anyone get great performance from any other brand of fuel? I see that Lexus recommends 91 octane, but has anyone tried mid grade 89 octane?
I realize it's probably not good for the knock sensor to use regular 87 octane.
Just wondering.
#3
I've used 89 and 91 - no real difference.
Reality is cars these days can adjust for higher/lower octanes. There's a recommended use for many but you can generally use whatever you feel is best (ie. willing to pay for).
Also - there is a long thread in here somewhere where this is discussed at length. I can tell you I know someone who has a Mazda CX-9 (?) and it required premium. This person did not use it and after about 100 miles on the tank the car broke down. Now, that's just an example from Mazda - I do NOT believe that Toyota/Lexus makes engines that act in that manner for not using the same octane. I've driven over 1,000 miles 89 and didn't have a problem ('11 IS350 AWD).
EDIT:
I should also mention that a majority of the time I do fill up with 91.
Reality is cars these days can adjust for higher/lower octanes. There's a recommended use for many but you can generally use whatever you feel is best (ie. willing to pay for).
Also - there is a long thread in here somewhere where this is discussed at length. I can tell you I know someone who has a Mazda CX-9 (?) and it required premium. This person did not use it and after about 100 miles on the tank the car broke down. Now, that's just an example from Mazda - I do NOT believe that Toyota/Lexus makes engines that act in that manner for not using the same octane. I've driven over 1,000 miles 89 and didn't have a problem ('11 IS350 AWD).
EDIT:
I should also mention that a majority of the time I do fill up with 91.
Last edited by Tarrant64; 03-09-13 at 04:47 PM.
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Parrokeete (07-08-22)
#6
If this was discussed in the past,please excuse me.I'm on this forum now for a week or so.
I use Shell 93 octane on my Wife's new IS-250-AWD. It seems to be a good match for the engine. Does anyone get great performance from any other brand of fuel? I see that Lexus recommends 91 octane, but has anyone tried mid grade 89 octane?
I realize it's probably not good for the knock sensor to use regular 87 octane.
Just wondering.
I use Shell 93 octane on my Wife's new IS-250-AWD. It seems to be a good match for the engine. Does anyone get great performance from any other brand of fuel? I see that Lexus recommends 91 octane, but has anyone tried mid grade 89 octane?
I realize it's probably not good for the knock sensor to use regular 87 octane.
Just wondering.
#10
Driver School Candidate
Only 91 octane. If I stay with one brand too long, I notice MPG going down a little, after I switch to a different brand, it goes back up. I alternate between Shell and Chevron.
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Parrokeete (07-08-22)
#11
Lexus Test Driver
Do what the factory recommends. The engine is tuned to run on 91. Lower octane means reduced efficiency and reduced performance. I once tried 89 and the car ran noticably slower and got worse mpg's- a waste of savings at the pump. Plus, with the 250's tendacy to have clogged injectors, you want the best firing and cleaning in there as possible.
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Parrokeete (07-08-22)
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Thanks all. I'll stick with the Shell 93.It's only 25 cents more per gallon than regular here.
GiantsFan I kind of figured you were an SF Giants fan seeing that you're in Cali.
My Bro-in-Law who moved from NY to San Fran is a traitor now.He said he likes the Giants instead of his once loved Mets. LOL
I'm a Yanks fan luckily.
GiantsFan I kind of figured you were an SF Giants fan seeing that you're in Cali.
My Bro-in-Law who moved from NY to San Fran is a traitor now.He said he likes the Giants instead of his once loved Mets. LOL
I'm a Yanks fan luckily.
#15
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https://www.clublexus.com/forums/is-...gas-is250.html