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Old 11-17-11, 06:19 PM   #1
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Default Gasoline grade

i just noticed on my 2006 gas door that it say "premium grade only". i've been using 87 gas this whole time, 75k miles now. is everyone using high octane gas?
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Old 11-17-11, 06:25 PM   #2
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Find the happy medium and go w/ 89. Does it ping at all? I use 89 and if I find 91 that is cheap like costco, then I use 91.
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Old 11-17-11, 11:17 PM   #3
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premium only
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Old 11-18-11, 07:54 AM   #4
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Premium only
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Old 11-18-11, 03:48 PM   #5
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Regular mostly with no issues but once in a while i'll fill up a full tank of premium.(usually on paydays)
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Old 11-18-11, 04:30 PM   #6
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Premium only
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Old 11-20-11, 05:13 PM   #7
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I used premium only until it broke $3 per gallon. After that I went to regular. I noticed a slight drop in gas mileage, about 0.2 mpg. Definitely not enough to justify the hire cost of premium.

I do buy ONLY Exxon/Mobil. I have Mobil branded credit card and get $0.15 off every gallon. So I get a high quality gas for the price of a discount brand...

Premium is NOT required for our trucks - it is recommended.

And yes, I plan on keeping this truick for a VERY long time.
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Old 11-20-11, 05:22 PM   #8
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no, my vehicle has never pinged even though its 9.6:1 compression ratio running 87 octane. i guess with no issues i am glad i didnt spend the extra $$ to go those 75k miles.
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Old 11-22-11, 08:56 AM   #9
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Same here, I should be using premium in both ML and GX but both of them are running fine on regular 87.
91 should burns cleaner do to aditives but the 87 burns faster and after measuring few tanks, there is no difference in mpg out of tank. GX has still the original exhaust and oxygen sensors, now at 259K miles, both front sensors on my ML320 went bad at around 150K miles (before switching from premium gas to regular).
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Old 11-22-11, 09:50 AM   #10
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70k mi and I use mostly regular. every so often I fill-up w/premium.
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Old 11-22-11, 08:40 PM   #11
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The ECU detects the octane indirectly and adjusts accordingly. Put in premium and get 100% of the published hp. Put in lower grades and you'll get somewhat less, like a handful of hp lower. No big deal one way or the other.
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Old 11-22-11, 08:56 PM   #12
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I don't pull and use it as a daily commuter.

I tried 3 tanks of premium (91) and didn't notice any difference in the way it drives or in the fuel economy so I use Mid Grade (89) which is 10% ethanol in Iowa.

-Eric
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Old 11-23-11, 10:33 AM   #13
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I run 89...87 Makes my GX run sluggish.
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Old 11-23-11, 11:06 AM   #14
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im pretty entertained by the number of folks who choose to ignore toyota's recs. look, filling up a tank and then not noticing anything doesn't mean everything is running in top form.

the human butt dyno is hard pressed to even discern a 25hp delta up or down. what makes you think a tank of gas is going to make you feel anything different?

it's about the long term health of your rig. if it says prem fuel only on your fuel door, run prem fuel. if you're struggling to justify the diff, why are you driving a gas guzzling rig anyways? let alone a luxury suv?

lol no offense, jus sayin
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Old 11-24-11, 06:41 AM   #15
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the health of my engine is perfect. plugs at 65k miles were perfect. of course i cant see what the valves look like but i do use injector/valve cleaner additive a few times per year.

a grade recommendation is typically for compression issues. most grades today have good detergents.

for me, it wasnt a choice, i just so happened to use 87 for 75k miles and then just recently noticed the gas door said "premium only". somethimes i think it s ploy to get we gas guzzler owners to buy the more expensive gas. 9.6:1 comp isnt all that high for gasoline.

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Old 11-24-11, 06:41 AM
 
 
 
 
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