Lil4cyl

premium in itself does not give you more power. Octane is nothing more than a fuels resistance to pre-ignition, or knocking/pinging.. whatever term you want to use. When this happens, the car is equipped with knock sensors that detect the knock, and the computer backs timing down from where it should be, which is where the perception of power loss comes from. If you use 87 octane, and are not experiencing any pre-ignition or knocking, then premium will make absolutly no difference other than what comes out of your wallet when you fill up. "perception of power loss" or the car is actually less responsive with 87 fuel? to me that is less power. there is also a benefit in my vehicle of more mpg that negates the extra cost, when i use premium. others also report better mpg with premium gas and the 'perception of more power'. we have been commenting on this gas question since the first 400h. the first manuel did not specify premium gas so we all experimented with regular and premium. later 400h manuels suggested premium. Of course you are welcome to use whatever you like, however i am getting the 'perception of more power' and better gas mileage with premium, with no penalty in final cost. Just a side note.. I will be using premium in my '10 450 AWD when I take delivery. Was supposed to arrive at port in Florida today, so maybe another 7-10 days until the dealer receives it. Welcome to our group, and i know you will enjoy your 450h. Since your 450h has an atkinsons cycle engine, i dont know if that will be an additional factor in what grade of gas to use, however know the premium will serve you well, tell us what it says in the manual regarding octane. I had a loaner 2010 non hybrid 4wd for a couple of days and i can tell you the seats are better, as was the handling with the new suspension. The position of the gps is more easily readable, and most of all i hated to part with the xm radio. We will know when your vehicle is delivered when you add the 450h to the bottom of your bio, what color did you get. Thanks. I just went to the Lexus Drivers site and checked my online manual. I don't have my actual print manual yet until I take delivery. It states 91 octane is recommended, which would be mid grade in this area. 93 is premium. I test drove a 450 2wd at the dealership, and loved it. So many nice features in it. When I take delivery, I'll post some pictures. It is Starfire Pearl White, with AWD, nav, hud, 12 speakers audios system, park assist, LED adaptive headlamps, Luxury package, comfort package, tow prep pkg, remote engine start, glass breakage sensors. I am also have them put full 3m clearmask on the front and side mirrors when they receive it to protect the paint from chips. Hope to get it by the end of the week, but most likely will be first to middle of the following week. Yes, I am like a kid in the candy store.. Anticipation builds each day.

premium in itself does not give you more power. Octane is nothing more than a fuels resistance to pre-ignition, or knocking/pinging.. whatever term you want to use. When this happens, the car is equipped with knock sensors that detect the knock, and the computer backs timing down from where it should be, which is where the perception of power loss comes from. If you use 87 octane, and are not experiencing any pre-ignition or knocking, then premium will make absolutly no difference other than what comes out of your wallet when you fill up. "perception of power loss" or the car is actually less responsive with 87 fuel? to me that is less power. there is also a benefit in my vehicle of more mpg that negates the extra cost, when i use premium. others also report better mpg with premium gas and the 'perception of more power'. we have been commenting on this gas question since the first 400h. the first manuel did not specify premium gas so we all experimented with regular and premium. later 400h manuels suggested premium. Of course you are welcome to use whatever you like, however i am getting the 'perception of more power' and better gas mileage with premium, with no penalty in final cost. Just a side note.. I will be using premium in my '10 450 AWD when I take delivery. Was supposed to arrive at port in Florida today, so maybe another 7-10 days until the dealer receives it.

premium in itself does not give you more power. Octane is nothing more than a fuels resistance to pre-ignition, or knocking/pinging.. whatever term you want to use. When this happens, the car is equipped with knock sensors that detect the knock, and the computer backs timing down from where it should be, which is where the perception of power loss comes from. If you use 87 octane, and are not experiencing any pre-ignition or knocking, then premium will make absolutly no difference other than what comes out of your wallet when you fill up. "perception of power loss" or the car is actually less responsive with 87 fuel? to me that is less power. there is also a benefit in my vehicle of more mpg that negates the extra cost, when i use premium. others also report better mpg with premium gas and the 'perception of more power'. we have been commenting on this gas question since the first 400h. the first manuel did not specify premium gas so we all experimented with regular and premium. later 400h manuels suggested premium. Of course you are welcome to use whatever you like, however i am getting the 'perception of more power' and better gas mileage with premium, with no penalty in final cost. Well, I was just stating the reasoning behind the octane ratings. If the Lexus Hybrids are tuned to perform better on premium fuel, that is the reason for the improved mpg. Just because you dont feel detonation does not mean its not happening. Which would stand to reason why the lower mpg with 87. If the ECU is pulling timing from detonation, it will reduce mpg because the combustion is not as efficient.

premium in itself does not give you more power. Octane is nothing more than a fuels resistance to pre-ignition, or knocking/pinging.. whatever term you want to use. When this happens, the car is equipped with knock sensors that detect the knock, and the computer backs timing down from where it should be, which is where the perception of power loss comes from. If you use 87 octane, and are not experiencing any pre-ignition or knocking, then premium will make absolutly no difference other than what comes out of your wallet when you fill up.