View Poll Results: What gas do you purchase for your car?
Premium Only - I need all the ponies!
215
74.65%
Midgrade Only - Not primo but better than regular
24
8.33%
Regular - It's all the same to me
32
11.11%
Depends - Sometimes I feel like a premium, sometimes I don't
17
5.90%
Voters: 288. You may not vote on this poll
Merged 3GS Fuel Threads - Is it OK to use REGULAR gas Instead of PREMIUM?
06-16-08, 09:56 PM
#167
Driver School Candidate
In order to achieve the best performance the knock sensor allows the engine to run with the ignition timing as far advanced as possible. The computer will continue to advance the timing until the knock sensor detects pinging. So the knock sensor works on premium fuel exactly as it works with regular.
Under the condition of generating max engine efficiency, knock sensor DOES NOT work the same as it does lower grade gasoline.
06-16-08, 10:22 PM
#168
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Join Date: Feb 2001
Location: San Francisco, CA
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engine efficiency peaks out at one point of specific condition. continuing advancing ignition time doesn't mean continuous engine efficiency increase, which mean ECU will not "continue to advance the timing until the knock sensor detects pinging".
Under the condition of generating max engine efficiency, knock sensor DOES NOT work the same as it does lower grade gasoline.
Under the condition of generating max engine efficiency, knock sensor DOES NOT work the same as it does lower grade gasoline.
06-16-08, 11:06 PM
#170
think we are debating engine performance on premium vs regular here.
ok. the mindset is, unless someone tells me running on regular is guaranteed 100% risk free for 100K miles, I will keeping using premium to protect my 50G property.
for those who use regular and trust modern engine technology of anti-knocking, here is the description of what anti-knock device does for your engine:
"An anti-knock device selectively retards and advances ignition timing based on the detected knocking of the engine, the engine speed and throttle position. This anti-knock device operates to suppress engine knock and reduce hunting, without producing an unexpected and sudden change in engine output and speed."
so it "detects" and then "suppresses" knocks. oh thanks but no thanks. I will use premium to relieve you from duty.
ok. the mindset is, unless someone tells me running on regular is guaranteed 100% risk free for 100K miles, I will keeping using premium to protect my 50G property.
for those who use regular and trust modern engine technology of anti-knocking, here is the description of what anti-knock device does for your engine:
"An anti-knock device selectively retards and advances ignition timing based on the detected knocking of the engine, the engine speed and throttle position. This anti-knock device operates to suppress engine knock and reduce hunting, without producing an unexpected and sudden change in engine output and speed."
so it "detects" and then "suppresses" knocks. oh thanks but no thanks. I will use premium to relieve you from duty.
06-17-08, 11:02 AM
#175
Driver School Candidate
06-17-08, 11:24 AM
#176
Lexus Test Driver
When newspapers and magazines tell you that premium is waste of money, they are refering to cars that use regular gas and cars that recommands premium not cars that requires it like the GS. try putting regular in a turbo charged or super charge engine and see what happens.
06-17-08, 11:33 AM
#177
When newspapers and magazines tell you that premium is waste of money, they are refering to cars that use regular gas and cars that recommands premium not cars that requires it like the GS. try putting regular in a turbo charged or super charge engine and see what happens.
06-17-08, 06:56 PM
#178
Lexus Connoisseur
Doesn't really help to pinch pennies on something that was engineered and optimized to be used with premium unleaded fuel. Lexus didn't spend millions of dollars to put that sticker on the inside of your fuel door for nothing.
06-18-08, 12:11 PM
#179
^^ exactly, again, why do people have to argue otherwise when "premium required" is labeled clearly, don't you think Lexus would rather put "87 OCTANE TOTALLY OK" instead to make it more appealing to the market? It's there for a reason and stick with it.
