My LS460 MPG Experiment
#76
Driver School Candidate
Join Date: Oct 2014
Location: utah
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Can someone help me understand why gas prices are going through the roof? I can understand an increase in prices but the increase has been dramatic that it doesn't make sense. Is it that supply is being artificially capped? There are more cars on the road than there were two years ago but I don't think that this is the reason. I just don't understand this.
#77
I used Shell v-power and contented with my mpg.
#78
Resurrecting a old thread here:
6 Pages and I don't think I saw any mention of the actual Octane Requirement. Keeping in mind that what is Regular here in the States may be Mid or premium in another country like the UK, Europe or South America and Canada. Shouldn't it be a discussion of Lexus calling for "Octane Rating 91 (Research Octane Number 96) or higher"?
My point is the RON number is the most important part as all these different geographic areas have different ideas what constitutes "Premium".
6 Pages and I don't think I saw any mention of the actual Octane Requirement. Keeping in mind that what is Regular here in the States may be Mid or premium in another country like the UK, Europe or South America and Canada. Shouldn't it be a discussion of Lexus calling for "Octane Rating 91 (Research Octane Number 96) or higher"?
My point is the RON number is the most important part as all these different geographic areas have different ideas what constitutes "Premium".
#79
I'm new here..
Hello all..
I thought I may chime in here. As a "X" factory trained mechanic, take my advice.
If the vehicle states "Premium Fuel only" well, then that's what the engine was designed and TUNED for, the timing and compression is raised for performance. The "Knock" and "Ping" that some refer to may seem innocuous and most often we cannot hear or recognize the frequency of these Knocks and Pings, but these are essentially untimely shocks or explosions within the engine. These untimely shocks resonate throughout the engine and in fact the actual sound is masked by the shear density of the engine. The stress this places on the engine (just for a short period) is devastating to bearings, crank, pistons, rings, valves etc.. Yes there are ping sensors that will retard the timing, but this is essentially to get you home in order to correct the octane issue and not to be driven for an extended period of time.
Hello all..
I thought I may chime in here. As a "X" factory trained mechanic, take my advice.
If the vehicle states "Premium Fuel only" well, then that's what the engine was designed and TUNED for, the timing and compression is raised for performance. The "Knock" and "Ping" that some refer to may seem innocuous and most often we cannot hear or recognize the frequency of these Knocks and Pings, but these are essentially untimely shocks or explosions within the engine. These untimely shocks resonate throughout the engine and in fact the actual sound is masked by the shear density of the engine. The stress this places on the engine (just for a short period) is devastating to bearings, crank, pistons, rings, valves etc.. Yes there are ping sensors that will retard the timing, but this is essentially to get you home in order to correct the octane issue and not to be driven for an extended period of time.
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jskennedy
RX - 3rd Gen (2010-2015)
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06-24-11 02:39 PM