IS - 3rd Gen (2014-present) Discussion about the 2014+ model IS models

Rugular gas or Premium?? For Cruising

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Old 06-05-15, 07:50 PM
  #16  
DaJoDJ
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Like everyone says... Premium or nothing... Unless you're stranded and have only Regular gas...

P.S. If you had to ask about which gas to use, then I'm sorry to say; Sir... you've bought the wrong car for your lifestyle.
Old 06-07-15, 06:03 PM
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steveo55
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91 octane or bust i got so used to using 91 octane on mine and my wifes car that i started using 91 on my tundra as well. I figure its not hurting anything why not. I hardly ever use the truck so i hardly ever fuel it up. Im pretty good at following directions and it says 91 octane on the gas cap
Old 06-07-15, 06:29 PM
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Ice350
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I'm going to be stronger than everyone else. Why? Because I sell these cars and I am sick of people asking can they use regular.
Why buy a premium car then use regular gas? There are so many cars out there that suit your needs and your budget. Go get one now!. Trade in your Lexus right now. You don't deserve it. Don't need it.
Old 06-07-15, 07:08 PM
  #19  
evident
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looks like we chased the op out of this thread lol
Old 06-07-15, 07:15 PM
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4TehNguyen
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try regular and watch how badly it will run, you wont do it again
Old 06-08-15, 10:10 AM
  #21  
EJ255t
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Originally Posted by evident
looks like we chased the op out of this thread lol
That's what happens when you ask stupid questions lol
Old 06-16-15, 12:23 PM
  #22  
shirosan
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Bummer OP... Well, we do have a manual that outlines what we can and can't do. Yeah, we can run pump gas as low as 87 octane but it is not recommended (just like we stated above). Figured I'd just post this image from our manuals for anyone else that might ask this question in the future.

Rugular gas or Premium?? For Cruising-pages-from-2014-lexus-is350-manual.jpg
Old 06-21-15, 06:58 AM
  #23  
roughyear
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Originally Posted by shirosan

If you did use a lower octane I would recommend using an octane booster to meet at minimum 91 octane (even though I believe the car should have 93). That's your best course of action or just keep paying for the high octane like the manual asks.

One good this is that these (current) cars are naturally aspirated (NA) so your chances of damaging your engine with lower octane will be much lower than putting 87 octane in an Evo or WRX lmao.

Purchasing the "Octane booster" is expensive.. I think like $6-$12 buckeroos per bottle, depending on the brand... filling up with Super 92/93 gas adds about $3-$4bucks to the tank full.. so it's cheaper on the wallet period, especially in the long run with the "potential" damage to the engine and the lower MPG that you'll most likely get from the 87 gas is break-even.
Old 06-21-15, 08:31 AM
  #24  
Sexis350
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Super premium. Fl 93!!
Old 06-22-15, 12:20 PM
  #25  
dagobert
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Knock sensors are there to protect your engine not your wallet.
Old 06-22-15, 01:39 PM
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theoryguy
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Rule of thumb: if your car is leased use regular, if you own your car use premium.
Old 06-22-15, 02:11 PM
  #27  
shirosan
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Originally Posted by roughyear
Purchasing the "Octane booster" is expensive.. I think like $6-$12 buckeroos per bottle, depending on the brand... filling up with Super 92/93 gas adds about $3-$4bucks to the tank full.. so it's cheaper on the wallet period, especially in the long run with the "potential" damage to the engine and the lower MPG that you'll most likely get from the 87 gas is break-even.
I agree with you. I only considered an octane booster if someone is on a long trip and needed to gas up in a small town that doesn't have premium gas. It would just be a temporary fix to protect against knock until a proper gas station was reached.


Originally Posted by theoryguy
Rule of thumb: if your car is leased use regular, if you own your car use premium.
Well, that would make a person think twice about buying a used Lexus now lol.
Old 06-22-15, 02:48 PM
  #28  
CtSFox
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Originally Posted by shirosan
I agree with you. I only considered an octane booster if someone is on a long trip and needed to gas up in a small town that doesn't have premium gas. It would just be a temporary fix to protect against knock until a proper gas station was reached.




Well, that would make a person think twice about buying a used Lexus now lol.
Seriously though, this is one of the reasons why I would never, ever, purchase a loaner. In addition to the abuse they endure, I can't imagine many people putting premium in the tank.
Old 06-22-15, 05:42 PM
  #29  
MWIS350
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Originally Posted by patrickkv2
If I want to drive normally and not drive that fast, can I just get regular gas?? I heard you should get premium gas ONLY if you using the performance alot.
Always used 92 or 93. I used 87 before and the car run slow and bad gas mileage.
Old 06-22-15, 09:24 PM
  #30  
patrickkv2
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Default Thanks alot guys

Yeah I figured i would use premium anyways. I just wanted to ask because I read something and it said you can use regular if you dont really use the car to go fast, just cruisin. But forsure wont sure regular!


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