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If you use regular gas in a lexus is250, can you switch to premium gas without damaging the car?

I’m looking at getting a 2006 or 2007 lexus is250. First off, I’m wondering what type of gas type i’m supposed to use. I’ver heard people have used regular gas and premium. Also, if the car I buy has always used regular gas and I start using premium, will it damage the car at all?



 

8 Users Response In " If you use regular gas in a lexus is250, can you switch to premium gas without damaging the car? "

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folleegrl says in July 31st 2010 at 1:03 am    

it should say it in your owner’s manual. some times it also says it somewhere around the cap for the tank gas. why would you change the gas? if it runs well on that one, just keep using it.. and no, it doesn’t damage the car at all… it just helps the car run smoother

Pancakes says in July 31st 2010 at 1:24 am    

Higher octane fuel (premium) will not harm your engine. At the least, it may increase mileage and horsepower, at the most it will be wasted as heat and the money spent on the higher fuel wouldn’t be worth it.

I'mRight says in July 31st 2010 at 2:18 am    

87 octane burns slower than 93 octane. If the engine was set up for a specific octane you should use only that. 93 doesn’t clean anything better, it doesn’t help with horsepower if your car was not designed for it. The computer tells the engine what mixture of air and fuel it needs to be most efficient. These mixtures will differ with different octane preferences. So, long story short, using a different octane than recommended can harm horse power because the system is either running too rich or too lean. This refers to the amount of gas/air in each cylinder during the ignition and power strokes. So, while it may not damage the car it could trigger a check engine light and/or make the car run poorly and cost YOU more money in gas. Use the octane rating the car is designed for. Look in the owners manual or somewhere near the fuel gauge or gas door. Or call a dealership. Good luck

Mike says in July 31st 2010 at 3:09 am    

their is no point, you should maintain your car with oil changes and use synthetic oil

Click here, read profile please says in July 31st 2010 at 3:42 am    

No.

crnd says in July 31st 2010 at 3:48 am    

The owner’s manual specifies premium, although it includes a caveat about regular being OK in a pinch, but to expect reduced performance.

If they used regular before, will it hurt to switch to premium? Of course not. Could you always use regular? Perhaps. But consider……

1. Do you really think me, you (or anyone here) knows more about what fuel the car should use than the engineers that designed it? Manufacturers also know that people generally want lower gas costs, if they thought regular would be OK, they wouldn’t specifiy premium.

2. Assume premium costs 20 cents a gallon more, you drive 15K miles a year and the car gets 25 mpg, all about right. Doing the math, you need 600 gallons a year, which will cost $120/yr extra. That’s $10/month. If $10/mo is that big a deal, you need to be looking at a Camry, not a Lexus.

Good luck!

Sam Arnold says in July 31st 2010 at 4:12 am    

You are using regular gas in a Lexus IS 250. Premium gasoline is the fuel which can be used in this regard. The figures regarding fuel consumption are as
Combined fuel-economy rating: 22.40 mpg
City/highway fuel-economy rating: 20/27 mpg

For further information you can visit the following website.
http://www.lexus.co.uk/

The Raven says in July 31st 2010 at 4:32 am    

No, it will burn the valves.


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