What fuel grade is everyone using on their 2012-2015 RX?
#137
Driver School Candidate
Join Date: Sep 2012
Location: illinois
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Our 2013 rx 350 FWD- regular gas thru COSTCO now with 5k miles,did experiment to put Premium gas-no
difference from regular gas,did spent 3 dollars more per full tank,maybe after 60k probably premium
every other full tank if I will remember and put in fuel injector cleaner once a year.
difference from regular gas,did spent 3 dollars more per full tank,maybe after 60k probably premium
every other full tank if I will remember and put in fuel injector cleaner once a year.
#139
#140
I will, however, agree with you in that some vehicles and engines will prefer one brand over another. Have stated such several times here at Club Lexus over the years based on my driving experiences. I know for a fact that my current RX runs great on BP/Amoco which is not listed as top tier and runs terrible on Exxon/Mobil which is listed.
#141
Some people don't believe that top tier gas makes a difference compared to any brand or no name gas. It does make a big difference,at least in my experience with my '12 RX-350-awd. I use Shell almost all the time. I had to use Citgo on a road trip. The RX did not have the same power. It felt somewhat sluggish. Once I filled it back up with Shell, it was back to great acceleration.
#142
top tier gas not hype
just wanted to put my two cents in about chevron and shell in particular, i have a ls430 2002. if i use non shell or chevron with regular unleaded in particular i notice the drivetrain is not as smooth as when i use the two gases with the most additives.. i have not been around a bp amoco that gas is good, but exxon and arco and mobil in particular are not on par with chevron and shell
safe driving
safe driving
#143
The whole "top tier" fuel argument is nothing but marketing hype. Do not get caught up in it.
I will, however, agree with you in that some vehicles and engines will prefer one brand over another. Have stated such several times here at Club Lexus over the years based on my driving experiences. I know for a fact that my current RX runs great on BP/Amoco which is not listed as top tier and runs terrible on Exxon/Mobil which is listed.
I will, however, agree with you in that some vehicles and engines will prefer one brand over another. Have stated such several times here at Club Lexus over the years based on my driving experiences. I know for a fact that my current RX runs great on BP/Amoco which is not listed as top tier and runs terrible on Exxon/Mobil which is listed.
It is sort of difficult to see or feel the difference when driving RX, but when I drove old Volvo that required premium fuel, I could definitely feel the difference in gas quality-on cheaper gas I 'd get valve noise going uphill, and the car would not pull at all, and on good Mobil/Exxon/BP gas it would pull just fine and no valve noise. I only used premium on that car;
When driving RX the difference is so little it is difficult to feel, but RX feels "peppier" and less noisy when I fill up w/ 89 grade.
#144
just wanted to put my two cents in about chevron and shell in particular, i have a ls430 2002. if i use non shell or chevron with regular unleaded in particular i notice the drivetrain is not as smooth as when i use the two gases with the most additives.. i have not been around a bp amoco that gas is good, but exxon and arco and mobil in particular are not on par with chevron and shell
safe driving
safe driving
Best to just try various stations to see what your ride likes and stick with it if you can.
#145
Anyone using premium fuel in the 2013 RX 350?
Please do not make this into a regular vs premium fuel war BUT....
I know Lexus says that the 2013 RX 350 does not need premium fuel, but is any current owner of a 2013 RX350 using it anyway? If you are, do you notice any difference?
Again, I am really only interested in the 2013 RX 350, not the older ones where premium was recommended by Lexus.
I know Lexus says that the 2013 RX 350 does not need premium fuel, but is any current owner of a 2013 RX350 using it anyway? If you are, do you notice any difference?
Again, I am really only interested in the 2013 RX 350, not the older ones where premium was recommended by Lexus.
#146
Lexus Test Driver
To what I know
Regular 87 will burn at lower heat, lower compression.
Premium 93 will burn at Higher heat, Higher Compression.
Every new car nowadays, not just RX, Their ECU is made to sense and Retard the timing, or go full advance. The best fuel will be the Fuel which is recommended by the Factory, because that is based on the engineered engine compression.
Let say if you put in Premium for an engine that required Regular, the Timing have to be retarded, Fuel will be wasted more, and the engine lose it efficiency in order to protect itself, from where it was engineered to do.
Vice Versa, if you were to put Regular into an engine that was engineered for Premium, the Computer will have to Advance the timing, and spark fire up earlier, but this will not be enough, and your engine will more likely burn a hole into Itself at higher RPM, and under load.
For all that said in Theory, I do not believe burning Premium in the RX will make it stronger, faster, or more efficient. The most Efficient was engineered, scaled, tested, proved carefully before they print out the Manual for you. :-)
Regular 87 will burn at lower heat, lower compression.
Premium 93 will burn at Higher heat, Higher Compression.
Every new car nowadays, not just RX, Their ECU is made to sense and Retard the timing, or go full advance. The best fuel will be the Fuel which is recommended by the Factory, because that is based on the engineered engine compression.
Let say if you put in Premium for an engine that required Regular, the Timing have to be retarded, Fuel will be wasted more, and the engine lose it efficiency in order to protect itself, from where it was engineered to do.
Vice Versa, if you were to put Regular into an engine that was engineered for Premium, the Computer will have to Advance the timing, and spark fire up earlier, but this will not be enough, and your engine will more likely burn a hole into Itself at higher RPM, and under load.
For all that said in Theory, I do not believe burning Premium in the RX will make it stronger, faster, or more efficient. The most Efficient was engineered, scaled, tested, proved carefully before they print out the Manual for you. :-)
Last edited by Whitigir; 04-08-13 at 10:12 AM.
#147
YES< I get more power from Premium as stated earlier; your ECU adjusts for better gas and gives you more power! I only put it in when going to Las Vegas over Cajon Pass or north over the Grapevine; both well over 4,000 feet so the more power helps against the thinner air at higher altitudes; I get great gas mileage!! I am no longer affiliated with NASCAR, but ask someone who is; they will occasionally have some 110 Octane Racing Fuel left and put it in a car or van; it flies!!! The person is wrong above that thinks engines can't adapt to higher octane and give you more power!!!!!!!!!!
Last edited by dctex99; 04-08-13 at 05:56 PM. Reason: Education
#148
I just always use Top Tier gas in my '12 RX-350. I mostly use Shell 87 octane as is required for the '12's. I did notice on a long drive once after having to use Citgo the RX didn't accelerate as good.
#149
In all my years I have found nothing to convince me that the detergents found in one brand of Top Tier gasoline, such as Kwik Trip which is listed as a Top Tier, is any better than what is found in say BP/Amoco which is not Top Tier.
#150
Lexus Test Driver
i noticed a difference when using Evian vs Aquafina when handwashing the RX. LOL!
kidding aside, the best way to determine a unbiased result is to do a Blind study and this should be done over time.
The owner/driver should have no clue if the tank he's driving has regular/mid grade/premium gasoline.
kidding aside, the best way to determine a unbiased result is to do a Blind study and this should be done over time.
The owner/driver should have no clue if the tank he's driving has regular/mid grade/premium gasoline.