Poll - LX570 owners using regular 87 octane or Premium

[OregonLC]

The thing I really like about discussions like this is how they bring up concepts that change how I view the systems. I always buy Tier 1 fuel. I do this because I feel that they prolong injector life. I had never considered the impact that engine deposits have on creating hot spots that may trigger pre-ignition knock and lead to retarded ignition timing and reduced performance or how these correlate to the specified octane requirement.

 

[32cls6speedmt]

I have noticed a shell gas station close to where we live has no ethanol unleaded at 87 octanes. It is the same price of premium. Shall one go with no ethanol or premium. I have been in the premium camp.

 

[T4Runner]

I’m very much anti ethanol

 

[M1911]

I’m very much anti ethanol

The local power tool repair guy loves ethanol. It provides lots of business repairing small power tools wrecked by ethanol, including my lawnmower, weedwhacker, etc. Sigh.

 

[32cls6speedmt]

The local power tool repair guy loves ethanol. It provides lots of business repairing small power tools wrecked by ethanol, including my lawnmower, weedwhacker, etc. Sigh.

funny, you mention, the whole reason, i was this gas station was to buy ethanol free gasoline for pressure washer. I understand ethanol is big no for small tools.

 

[TeCKis300]

I have noticed a shell gas station close to where we live has no ethanol unleaded at 87 octanes. It is the same price of premium. Shall one go with no ethanol or premium. I have been in the premium camp.

As much as I dislike despise ethanol, I would say no. Your vehicle requires the requisite octane first, to ensure safe combustion. This would actually be a case where un-watered-down 87 octane would show better range per tank. But would potentially have unsafe levels of knock/preignition under load. Ethanol is used as a cheap octane booster and filler in gasoline - it has octane (combustion resistance), yet has lower energy content.

Speaking of ethanol, I've been enjoying doing maintenance on the carbs of my 2x Honda eu2000i generators this past 2 weeks. No thanks to all the gunk and varnish caused by ethanol in small engines. Cleaning pin-hole size orifices that have varnish is a PITA. It's incredibly hard to come by non-ethanol laced fuel in socal. Need to use StaBil and Seafoam when put away wet.

 

[hankinid]

funny, you mention, the whole reason, i was this gas station was to buy ethanol free gasoline for pressure washer. I understand ethanol is big no for small tools.

I've gone to no-ethanol as E-10 in a power tool (2 or 4 cycle) will begin to dissolve fuel lines slowly but surely. I've repaired a few with ethanol fuel left in them during winter...fix involves replacing all lines. No issues with no-ethanol fuel, still good to drain the tools and run them dry, but fuel stabilizer is adequate.

Steve

 

[Hokie99]

I know this is an old posting but I thought this might give everyone some insight...I have a 2010 Tundra non flex fuel 5.7, 260k miles, only run 87 octane...no issues and still runs very strong, no issues ever with power loss or pinging under load. Buyin my my wife an LX 570 soon since I love that engine so much and she will run 87 as well.

 

[chilibit]

The Tundra specification was for 87 octane from the factory.

 

[Hokie99]

There is no difference in the engines....if you run premium in either I believe the gain is 3hp....all part numbers on both engines cross match. Heads, cylinders, filters, oils, plugs, radiators, everything is identical.

 

[biff44]

Have any LX570 owners who have used regular octane actually heard engine knock? I've used regular and premium, and to be honest, I can't hear if the engine sounds different or not with both.

the LX has engine shrouds and insulation that would make it HARD to hear engine knock.

 

[Hokie99]

Ran a 5.7 in my Tundra nearly 300k miles with Regular gas no issues. Wife runs her 2016 LX570 with Regular. Same engine as in the Tundra….3hp difference between Reg and Premium.

Not sure why I’d pay the extra money for virtually no gain.

 

[biff44]

Ran a 5.7 in my Tundra nearly 300k miles with Regular gas no issues. Wife runs her 2016 LX570 with Regular. Same engine as in the Tundra….3hp difference between Reg and Premium.

Not sure why I’d pay the extra money for virtually no gain.

Maybe i should reconsider, and run 89 octane instead of the 91. 87 probably is too low though, at least in my thinking

 

[pvchaitanya]

there are a lot of assumptions in my statement and some have been factually verified:

I have tried costco regular/premium and sunoco/shell regular premium gas with my current lx 570 and my previous highlander.
I found that costco consistently gave lower miles both on highway and city driving compared to sunoco/shell. (for both reg/premium gas). The difference is 20-35 miles less on a full tank. This really didn't see like a saving at all as the price difference is negating the lowers miles for full tank plus the wait time at costco.

Now coming to reg/premium at shell and sunoco (yeah I heard many say its the same top tier gas, same truck delivers it to both costco and others), I do see noticeable difference in the rpm my truck runs at idle, the pickup, mpg and total miles I get on a full tank.

Premium gives better gas mileage than regular on my truck. regular give 12.3 mpg and premium give 13.2 - 13.7 mpg.

Unless you are on road all the time driving 20k+ miles every year. I don't see a big difference in how much extra you are shelling out on premium gas vs regular considering a little bit of extra miles you get and some extra protecting on your engine with additives in premium fuel.

I personally think its short term gain in savings and long term loss via engine repairs or wear and tear.

(if you want to see the difference in how costco vs other pumps and reg/premium performs , use it on motorcycle when fuel is driven to empty. you will see the difference right away on how engine is responding at idle, pickup and mpg as well.)

 

[pvchaitanya]

is no difference in the engines....if you run premium in either I believe the gain is 3hp....all part numbers on both engines cross match. Heads, cylinders, filters, oils, plugs, radiators, everything is identical.

except the ECU senses the octane rating and adjusts the fire timings to fire for best output.
I dont think you engine will knock because you put lower gas or bad gas due to this feature. But its not use the setup most efficiently to get best output from the cycle.

It may still save you 10$ per fill on regular vs premium considering premium gives a bit extra mileage. so the 60 cents difference (just verified it at my local shell pump) for 24 gallon tank you save $14.4 on a fill compared to premium.
My truck shows .6 mpg (avg) difference driving reg vs premium, that extra 14.4 miles I get to drive on premium. which is equal to (little more than a) gallon of gas which is at 4$ so the real saving is 10$ per fill.

 

[biff44]

except the ECU senses the octane rating and adjusts the fire timings to fire for best output.
I dont think you engine will knock because you put lower gas or bad gas due to this feature. But its not use the setup most efficiently to get best output from the cycle.

It may still save you 10$ per fill on regular vs premium considering premium gives a bit extra mileage. so the 60 cents difference (just verified it at my local shell pump) for 24 gallon tank you save $14.4 on a fill compared to premium.
My truck shows .6 mpg (avg) difference driving reg vs premium, that extra 14.4 miles I get to drive on premium. which is equal to (little more than a) gallon of gas which is at 4$ so the real saving is 10$ per fill.

no. the ecu detects KNOCKS. it retards the spark advance until the knocks are reduced. but if you floor it going uphill, the knocks can still happen...as the ecu takes time to readjust things.

you would need a chemistry lab under the hood to detect the actual octane of the fuel in the tank

 

[AnyMal]

There is no difference in the engines....if you run premium in either I believe the gain is 3hp....all part numbers on both engines cross match. Heads, cylinders, filters, oils, plugs, radiators, everything is identical.

Is this 100%? I’ve heard more and more conflicting things on this.

 

[pvchaitanya]

no. the ecu detects KNOCKS. it retards the spark advance until the knocks are reduced. but if you floor it going uphill, the knocks can still happen...as the ecu takes time to readjust things.

you would need a chemistry lab under the hood to detect the actual octane of the fuel in the tank

thanks for correcting.

 

[turbo8]

 

[JR YORK]

Now that the difference between Regular and Premium is running between 60-90 cents a gallon, in my book this becomes a issue. Check what you are using. If using Regular 87 octane has caused a problem let us know?

Yeah I just spent over $100k on an SUV. Let's just go against the advice of the engineers and see what happens long-term. People really do bitch about $500/year +/-? Higher octane burns cleaner and it is recommended for this vehicle. I also have a Tundra that I feed 91 or better. If you can't afford it, buy a Ford Explorer. Otherwise, you could take a chance and burn s*** fuel and see what happens. Best of luck on your $100k investment.