Does gas grade matters on our tc?
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Joined: Jul 2007
Posts: 18
Does gas grade matters on our tc?
like the title says does it really matter?
http://answers.yahoo.com/question/in...0120704AA7zbbz
http://answers.yahoo.com/question/in...0120704AA7zbbz
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Joined: Mar 2006
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From: Flushing, NY
our tc's have high compression engines i believe which requires the use of higher octane fuels... to use of 87 will greatly reduce the life of your tc... honestly.. ur probably only saving $1.50 at the pump by putting in a lower grade... dont screw urself with taht
Originally Posted by T8tC
i've been using 93 octane ever since i got my tc, would it hurt anything if i down grade to 87?
you are just wasting your money.
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From: Flushing, NY
it does matter guys... our tc engines have close to a 10:1 compression ratio (9.6:1 i believe) which does require a higher octane... im not sure what the factory recommends, but it will decrease the longevity of your car by using a lesser fuel
Originally Posted by smilezdc
it does matter guys... our tc engines have close to a 10:1 compression ratio (9.6:1 i believe) which does require a higher octane... im not sure what the factory recommends, but it will decrease the longevity of your car by using a lesser fuel
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From: Flushing, NY
ok.. well... dont take my word on this one, but this is what i understand and am learning about..
our tc's do ahve high compression engines... 9.6:1 is high... 8:1 is normal.. so yeah..
the octane u use on your car is really reliant on the compression ratio of your engine. High compression ratio requires higher octane...
sooo... i dunno.. i think im right, but i can be wrong too.. not trying to start anything with anyone..
our tc's do ahve high compression engines... 9.6:1 is high... 8:1 is normal.. so yeah..
the octane u use on your car is really reliant on the compression ratio of your engine. High compression ratio requires higher octane...
sooo... i dunno.. i think im right, but i can be wrong too.. not trying to start anything with anyone..
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From: -
No... our tC's do NOT have high compression engines. Lexus, mercedes, BMW, all the guys who tell you to exclusively put in high octane gas tell you to do so because their engines run with a 12:1 or HIGHER compression ratio. The typical engine these days has a 10:1 CR. The tC also has a knock sensor, which is designed to prevent engine knock...
You can put in high octane gas if you want, it won't affect performance, but it won't make your engine last any longer either. You won't get any more pinging on 87 than 91.
Forced induction on the other hand... yes you should run high octane.
You can put in high octane gas if you want, it won't affect performance, but it won't make your engine last any longer either. You won't get any more pinging on 87 than 91.
Forced induction on the other hand... yes you should run high octane.
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From: SoCalifornia
o dam that shiz on yahoo is so rich ... dont believe it
IMO, 89 is a total waste on any car built after 1978. Normally 87 (even 86) is ok 'cause the tC computer monitors exhaust & adjusts timing accordingly. I notice a dif w/91, in MPG; & some higher grades have more detergents which reduce/prevent carbon buildup. I'm not sayin' that either is a good enuf reason, 'cause it could argued that it still aint worth the extra$$. Now, while there's no noticeable output dif, I have noticed m'car runs less smoothly on 87.
tC 2005-06 = 9.6 vs 07-up = 9.8; TRD F/I recommends 91 or more octane.
Aside from ethanol, which will alter your MPG, IMO, just get what U want, itl'll be fine. It's the way U drive that has more affect on longevity anyway.
IMO, 89 is a total waste on any car built after 1978. Normally 87 (even 86) is ok 'cause the tC computer monitors exhaust & adjusts timing accordingly. I notice a dif w/91, in MPG; & some higher grades have more detergents which reduce/prevent carbon buildup. I'm not sayin' that either is a good enuf reason, 'cause it could argued that it still aint worth the extra$$. Now, while there's no noticeable output dif, I have noticed m'car runs less smoothly on 87.
tC 2005-06 = 9.6 vs 07-up = 9.8; TRD F/I recommends 91 or more octane.
Aside from ethanol, which will alter your MPG, IMO, just get what U want, itl'll be fine. It's the way U drive that has more affect on longevity anyway.
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Thank you tcCAlI... and I didn't actually read that yahoo thing until just now... I just read everyones posts on this thread...
Let's just say I laughed when I read what that one idiot wrote. "The pistons aren't forged to handle 89 octane... which will cause them to detonate, and you'll feel bumps"...
Let's just say I laughed when I read what that one idiot wrote. "The pistons aren't forged to handle 89 octane... which will cause them to detonate, and you'll feel bumps"...
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From: Maryland
Originally Posted by divisii
o dam that shiz on yahoo is so rich ... dont believe it
IMO, 89 is a total waste on any car built after 1978. Normally 87 (even 86) is ok 'cause the tC computer monitors exhaust & adjusts timing accordingly. I notice a dif w/91, in MPG; & some higher grades have more detergents which reduce/prevent carbon buildup. I'm not sayin' that either is a good enuf reason, 'cause it could argued that it still aint worth the extra$$. Now, while there's no noticeable output dif, I have noticed m'car runs less smoothly on 87.
Aside from ethanol, which will alter your MPG, IMO, just get what U want, itl'll be fine. It's the way U drive that has more affect on longevity anyway.
IMO, 89 is a total waste on any car built after 1978. Normally 87 (even 86) is ok 'cause the tC computer monitors exhaust & adjusts timing accordingly. I notice a dif w/91, in MPG; & some higher grades have more detergents which reduce/prevent carbon buildup. I'm not sayin' that either is a good enuf reason, 'cause it could argued that it still aint worth the extra$$. Now, while there's no noticeable output dif, I have noticed m'car runs less smoothly on 87.
Aside from ethanol, which will alter your MPG, IMO, just get what U want, itl'll be fine. It's the way U drive that has more affect on longevity anyway.
octane rating has absolutely NOTHING to do with MPG. and if an engine is designed to run on 87 octane, it won't run ANY differently on higher octane gases.
different gas chains have different detergents they put in their fuel to reduce carbon deposits and build up. they are called top tier fuels, some carriers are shell, exxon and chevron, there are others, but i can't remember them all. but again, octane, nothing to do with MPG, thank you and goodnight.
oh, and SEARCH!!! i've had to correct so many morons on this topic many many times before.