View Poll Results: OCTANE - Which gas do you put in your 3IS
I always use 91 or higher.
259
91.20%
I sometimes use 89 or 87.
3
1.06%
I always use 89.
6
2.11%
I always use 87.
16
5.63%
Voters: 284. You may not vote on this poll
OCTANE - Which gas do you put in your 3IS and why?(merged threads)
#16
The following users liked this post:
igetit14is (12-03-18)
#20
Wow, people suck. I'm leasing and this is my second Lexus lease. I treat them like they're my cars, not like they're some rental from Enterprise. If the car requires premium fuel, use premium fuel. It's not complicated.
#22
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I test drove a IS250 non F Sport last weekend. Very comfortable seats and nice quiet ride. The salesman said with the 2014 models, you don't have to use premium gas. From what I am reading on the forum, that is not true. Is he just being a salesman? Please enlighten me. Thanks.
#23
The pursuit of F
Thread Starter
I test drove a IS250 non F Sport last weekend. Very comfortable seats and nice quiet ride. The salesman said with the 2014 models, you don't have to use premium gas. From what I am reading on the forum, that is not true. Is he just being a salesman? Please enlighten me. Thanks.
When you go back to see him, pop the gas tank cover and show him the "Premium Unleaded Fuel Only" label. It doesn't say "Recommended" in which case arguably he would be right. This is across all IS's.
#24
Lexus Test Driver
iTrader: (2)
I test drove a IS250 non F Sport last weekend. Very comfortable seats and nice quiet ride. The salesman said with the 2014 models, you don't have to use premium gas. From what I am reading on the forum, that is not true. Is he just being a salesman? Please enlighten me. Thanks.
#26
A few years back, Consumer Reports commented on the use of premium and mid-grade fuels. They said it's only worth using premium (or mid-grade) if the manufacturer REQUIRES it. If it's just RECOMMENDED (echoing Corrado), Consumer Reports said to use regular fuel.
Personally, I follow the recommendation of both Lexus and Consumer Reports: 91 Octane or higher in my IS.
Personally, I follow the recommendation of both Lexus and Consumer Reports: 91 Octane or higher in my IS.
#27
Premium or regular gas???
I just did my first 5000 miles service at my local dealership, and while I was waiting for my 3is. I had a conversation with another staff. He told me that I can use 87 octane/regular gas on our 3is!!??! I said on the owner's manual it said clearly premium gas only, but he said all of their Lexus vehicles can use regular gases, and it will work fine. He also told me that the reason that Lexus put Premium gas only on the owner's manual it was because Lexus is a premium brand , and they don't want to be cheap. But technically speaking, regular gas is fine with 3is....
I knew for sure that 87 will lose some HPs, but not sure if it will harm the vehicle. ANy one can help me out here, is this really true that we can use 87 on our 3is?
I knew for sure that 87 will lose some HPs, but not sure if it will harm the vehicle. ANy one can help me out here, is this really true that we can use 87 on our 3is?
#29
Lexus Test Driver
rominl is correct. In addition to that, these same engines are used in vehicles in countries where there is no such thing as premium fuel. So guess what they use? You will get arguments from both sides. I've heard it doesn't matter, you'll have a performance lag, etc., etc. Most folks with a Lexus will say, if you can afford a Lexus, you should be able to affort putting the best grade of fuel available. This, as with many things on this forum, you be the judge!