is it alright if i put regular unleaded (87 octane)
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this topic has been discussed many times
if you read the owner's manual, it said mininum 87 octane, and for better performance, use premiun unlead.
my 99 v6 solara, 93 camry stick shift both use 87 octane no problem
my 94 v6 camry, i use mid grade 89.
You have to see how to car performs with 87/89 or 91. I put 91 on mine and the car runs very very good, with 87 the car perform very lazzy and you can hear some valve knoking. W/89 performs well but still no the whole power going up hill and the with thw a/c on. With 91 not restriccions at all. I don't drive my car very much so it doesn't hurt to put 91..Try and see, maybe you can settle w/89...
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get supreme or super supreme for better performance
i've used 87, 89, 91. 87 is for when low on dough and need gas. 89 is the middle of the two. 91 is when im feeling like balling. and thats just MY opinion.
i've notices the difference between each grade but i guess thats up the person. since most of my friends seem to not notice.
i've notices the difference between each grade but i guess thats up the person. since most of my friends seem to not notice.
I have great luck with all gas except if it is sold at KWIK FILL (RED APPLE),I think they sell low octane petro with a false reading..My vehicles no matter which ones I put this gas into my tank and I get frozen gas lines and performance issues with pinging They should sell that SH!T for pennys .All other gas has been fine,but I do fill with 91 twice between oil changes (one a month) with fuel treatment and run the rpm consistantly higher with these tanks to try to burn carbon from my engine..
GD I hate people giving bad advice. Unless you need 5hp more, just use 87. I've been using 87 ONLY for the last 20k miles in my 96 V6. Whoopty do, 5hp. I'm happy with the extra $50 I've saved using 87. If you car has issues running 87, your car needs to be repaired. Stick with 87 unless you want 5hp more.
omg! ok it doesnt hurt your engine at all, 87 octane means lower combustion camber temperatures(less force acting on the piston; therefore higher octane mean more force on piston), the higher the octane higher pressures are needed for the fuel to ignite properly. I've never heard that higher octane gives you more power, i believe its non-sense. If you were turbo or super charged it'd be a different story, now you want the higher octane gasoline which needs higher pressures and temperature needed in order to ignite the fuel without detonation in the combustion camber. So in summary 87 wont hurt the engine, higher octane fuel will not hurt either but it will put a small amount more load since the crankshaft will need to push "harder" to get the higher temp exhaust gases quicker then it would in lower octane level
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gasoline octane has (a lot) to do with ignition stability. 87 octane will ignite slightly easier than higher octane fuels. Hence it being more prone to detonation when subjected to high combustion chamber temperatures (from boost, nitrous, high compression, lean condition ect.) Higher octane is less prone to pre detonation and contains slightly less chemical energy than lower octane fuels, though it's a fairly small change.
Want to see the real difference? Put 87 is a supercharged car, the knock sensors will go crazy and retard the timing. Thats the loss in power you feel.
quite the same, worded differently, currently taking fuel classes so i know what im taking about maybe it was just worded differentlyCreeps228 said:
mind you he's stock 87 wouldnt hurt his engine in anyway nor would 91/93 octane. HIgher octane levels need high temperature to ignite, which stock motors dont produce. SO if your a detonation worry wart 91/93 are less prone to detonation but theorically would require the crankhaft to work more getting excess exhaust gases out. 87 octane easier to burn more likely to ignite under high temps/pressures (only under turbo/super charged engines) causing detonations
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LoL sorry no offense intended, wording was indeed a bit.. odd
no problem im half asleep, so saoxcore in conclusion:
87,89,91,93 octane wont hurt your engine in any way UNLESS you own a supercharged car (turbo'd or super'd) 87 is bad, im not sure about 89 ( i believe thats NYs premium, 91 being our super (not sure) )...use the highest priced one if your car is supercharged:lol:
87,89,91,93 octane wont hurt your engine in any way UNLESS you own a supercharged car (turbo'd or super'd) 87 is bad, im not sure about 89 ( i believe thats NYs premium, 91 being our super (not sure) )...use the highest priced one if your car is supercharged:lol:
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Here's the problem: the 1MZ suffers from poor knock/detonation control. The amount of power you'll lose with 87 octane is about 20 crank horsepower, and that's not a typo or a joke. The 1MZ uses flat topped pistons, and as mileage increases, carbon deposits form, raising the compression more. The newer GR motors use a taper squish piston and matching valve area for improved anti-knock performance. Unfortunately, the knock control in the 1MZ ECU is shitty. You can see it on a dyno with 87. The power is erratic and the timing is constantly advanced and retarded.
At the slightest hint of pinging, the ECU retards the timing. So, yes, you can use 87 octane, but just know that if you have over 60k miles, there's some carbon on the pistons and you might see a greater amount of power loss since the deposits raise compression.
So:
Solara/Avalon:
180hp on 87
190hp on 89
200hp on 91
Camry:
172hp on 87
182hp on 89
192hp on 91
At the slightest hint of pinging, the ECU retards the timing. So, yes, you can use 87 octane, but just know that if you have over 60k miles, there's some carbon on the pistons and you might see a greater amount of power loss since the deposits raise compression.
So:
Solara/Avalon:
180hp on 87
190hp on 89
200hp on 91
Camry:
172hp on 87
182hp on 89
192hp on 91
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And the 1MZ suffers from pinging with 87 which the knock sensors detect, and the ECU very aggressively retards the timing, hence the power loss. In order to achieve the maximum rated power output, you must use 91 octane or higher. It doesn't give you more power, it just keeps you from losing power from timing retard and erratic ignition.
yea in my 4 cylinder I only gain 1 mpg average with mid grade over regular. I don't see any change in performance. In my old 95 camry it would ping a little with regular but probably due more to mileage. I agree with asg14, if it gives you a problem then something else is probably wrong.
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