Auto Insurance Auto Insurance    FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Gas for 07 Lexus 350 Goto page 1, 2  Next          Auto Insurance Forum Index -> Lexus View previous topic :: View next topic   Author Message Guest Posted: Mon May 26, 2008 5:32 pm    Post subject: Gas for 07 Lexus 350 I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. Back to top   Ads Advertising Sponsor Ray O Guest Posted: Mon May 26, 2008 8:01 pm    Post subject: Re: Gas for 07 Lexus 350 <urickcw@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... Quote: I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. The part about "your mileage may vary" also applies to the use of regular or mid grade fuel instead of premium. When you use lower octane fuel, the engine knock sensors may detect knocking and retard ignition timing, which will reduce the power the engine produces, which may reduce fuel economy. Calculate the fuel economy you are getting with premium on a cost per mile basis and compare with what you get with regular or mid-grade fuel. I've found that fuel economy goes down a little with regular, so that on a cost per mile basis, there is no difference between regular and premium except for the slight loss of performance. -- Ray O (correct punctuation to reply) Back to top   Ads Advertising Sponsor muzzy Guest Posted: Mon May 26, 2008 11:43 pm    Post subject: Re: Gas for 07 Lexus 350 Bought my RX350 last July, have always used regular in it - no ill effects and get great mileage for an SUV. On Mon, 26 May 2008 12:32:10 GMT, urickcw@verizon.net wrote: Quote: I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. Back to top   Ads Advertising Sponsor Jay Somerset Guest Posted: Tue May 27, 2008 2:16 am    Post subject: Re: Gas for 07 Lexus 350 On Mon, 26 May 2008 12:32:10 GMT, urickcw@verizon.net wrote: Quote: I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. Regular grade won't hurt it, but your mileage won't be as good (the timing gets retartded to avoid repeated pinging/knocking/detonation. I find that the higher price of mid-grade gas is more than offset by the better mileage, so almost always avoid regular for that reason. I haver not found the additional cost of "super" to worth any further slight improvement in mileage, so avoid that as well. -- Jay (remove dashes for legal email address) Back to top   Ads Advertising Sponsor Guest Posted: Tue May 27, 2008 2:23 am    Post subject: Re: Gas for 07 Lexus 350 All modern engines will accommodate regular gas by retarding ignition timing. Unless the manual say otherwise you can always use regular. On May 26, 5:32 am, uric...@verizon.net wrote: Quote: I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. Back to top   Ads Advertising Sponsor Elmo P. Shagnasty Guest Posted: Tue May 27, 2008 2:45 am    Post subject: Re: Gas for 07 Lexus 350 In article <3v9m349el4fim8pi1c1gesg4t1j1fq9qgq@4ax.com>, Jay Somerset <jay-1941-@hotmail.com> wrote: Quote: Regular grade won't hurt it, but your mileage won't be as good It's not about the mileage, it's about the fuel cost per mile. Period. Back to top   Ads Advertising Sponsor jdoe Guest Posted: Tue May 27, 2008 4:42 pm    Post subject: Re: Gas for 07 Lexus 350 On Mon, 26 May 2008 12:32:10 GMT, urickcw@verizon.net wrote: Quote: I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. I have an 05 rx 330, about the same vehicle, and have always run regular gas with no ill effects, the possible issues from using regular in this car could be a slight loss of engine power and very slight hit on fuel economy, neither of which has been an issue in my case __________________________________________ Never argue with an idiot. They'll drag you down to their level and beat you with experience. Back to top   Ads Advertising Sponsor Jay Somerset Guest Posted: Tue May 27, 2008 4:54 pm    Post subject: Re: Gas for 07 Lexus 350 On Mon, 26 May 2008 17:45:19 -0400, "Elmo P. Shagnasty" <elmop@nastydesigns.com> wrote: Quote: In article <3v9m349el4fim8pi1c1gesg4t1j1fq9qgq@4ax.com>, Jay Somerset <jay-1941-@hotmail.com> wrote: Regular grade won't hurt it, but your mileage won't be as good It's not about the mileage, it's about the fuel cost per mile. Period. Go back and re-read the referenced post -- that's what I said. -- Jay (remove dashes for legal email address) Back to top   Ads Advertising Sponsor kitzler Guest Posted: Tue May 27, 2008 7:44 pm    Post subject: Re: Gas for 07 Lexus 350 On May 26, 11:01 am, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote: Quote: uric...@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. The part about "your mileage may vary" also applies to the use of regular or mid grade fuel instead of premium. When you use lower octane fuel, the engine knock sensors may detect knocking and retard ignition timing, which will reduce the power the engine produces, which may reduce fuel economy. Calculate the fuel economy you are getting with premium on a cost per mile basis and compare with what you get with regular or mid-grade fuel. I've found that fuel economy goes down a little with regular, so that on a cost per mile basis, there is no difference between regular and premium except for the slight loss of performance. -- Ray O (correct punctuation to reply) I heard that too, Ray, but at my 20K service stop, the Lexus rep recommended I switch my 2006 GS300 engine from premium to regular. My beef was actually sooty tailpipes, even though the car does not use oil. Three things: (1) yes, some loss of power when not downshifting, (2) no more hesitation when I stop quickly and try to step on the gas immediately, like at a stop sign when there is no oncoming traffic, and (3) about 10% better mileage on the highway... I could not believe it, I thought maybe because the knock sensor had not reset itself for less timing advance, when I switched to regular, but after almost 14000 miles on regular, I cannot say I regret going to regular. Now I may reduce engine valve life, because I think regular burns hotter, but I do not plan to keep the car beyond 75K. Would appreciate your feedback on my comments Ray! BTW, my tailpipes are as sooty as ever, but I notice all GS300 have sooty tailpipes.. Back to top   Ads Advertising Sponsor Xplant Guest Posted: Tue May 27, 2008 9:16 pm    Post subject: Re: Gas for 07 Lexus 350 "Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message news:2qWdnU-XiOVETafVnZ2dnUVZ_s7inZ2d@comcast.com... Quote: urickcw@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. The part about "your mileage may vary" also applies to the use of regular or mid grade fuel instead of premium. When you use lower octane fuel, the engine knock sensors may detect knocking and retard ignition timing, which will reduce the power the engine produces, which may reduce fuel economy. Calculate the fuel economy you are getting with premium on a cost per mile basis and compare with what you get with regular or mid-grade fuel. I've found that fuel economy goes down a little with regular, so that on a cost per mile basis, there is no difference between regular and premium except for the slight loss of performance. -- Ray O (correct punctuation to reply) I remember reading this when gas was $2.00 a gallon (premium was say $2.20/gallon or a 10% premium - so presumably you got 10% better mileage w/ premium). Now gas is $4.00/gal (say premium $4.25/gal or 6.25% premium so you need only 6.25% better mileage). My question is, is the extra mileage really 6% or 10% better?? Frankly, I have tried to measure this on my car. I take the same 450 mile (each way) trip every year, at about the same time of year, for the last 6-8 years and stop at the same stations. Frankly I haven't been able to prove any consistent difference between premium and mid-grade in my SC400 as other factors (temperature, wind, tire pressures/air filter restrictions/state of tune, etc.) seem to offset the effects of difference in fuel. So now I just stick with the mid-grade. Xplant Back to top   Ads Advertising Sponsor Ray O Guest Posted: Wed May 28, 2008 7:48 am    Post subject: Re: Gas for 07 Lexus 350 "Xplant" <XPlant@comcast.net> wrote in message news:LYWdnesU1KmTqaHVnZ2dnUVZ_tTinZ2d@comcast.com... Quote: "Ray O" <rokigawaATtristarassociatesDOTcom> wrote in message news:2qWdnU-XiOVETafVnZ2dnUVZ_s7inZ2d@comcast.com... urickcw@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. The part about "your mileage may vary" also applies to the use of regular or mid grade fuel instead of premium. When you use lower octane fuel, the engine knock sensors may detect knocking and retard ignition timing, which will reduce the power the engine produces, which may reduce fuel economy. Calculate the fuel economy you are getting with premium on a cost per mile basis and compare with what you get with regular or mid-grade fuel. I've found that fuel economy goes down a little with regular, so that on a cost per mile basis, there is no difference between regular and premium except for the slight loss of performance. -- Ray O (correct punctuation to reply) I remember reading this when gas was $2.00 a gallon (premium was say $2.20/gallon or a 10% premium - so presumably you got 10% better mileage w/ premium). Now gas is $4.00/gal (say premium $4.25/gal or 6.25% premium so you need only 6.25% better mileage). My question is, is the extra mileage really 6% or 10% better?? Frankly, I have tried to measure this on my car. I take the same 450 mile (each way) trip every year, at about the same time of year, for the last 6-8 years and stop at the same stations. Frankly I haven't been able to prove any consistent difference between premium and mid-grade in my SC400 as other factors (temperature, wind, tire pressures/air filter restrictions/state of tune, etc.) seem to offset the effects of difference in fuel. So now I just stick with the mid-grade. Xplant Good question! I haven't calculated cost per mile since gas was $3.00 per gallon so I don't know the answer. My guess is that as the price of gas increases, you start to come out ahead with premium. I've been using mid-grade for the past couple of months and have been getting between 18.5 and 18.9 MPG, while I used to get about 1 MPG better with premium. -- Ray O (correct punctuation to reply) Back to top   Ads Advertising Sponsor Ray O Guest Posted: Wed May 28, 2008 8:07 am    Post subject: Re: Gas for 07 Lexus 350 "kitzler" <njanus@optonline.net> wrote in message news:1a10a7c3-81a7-44ba-b39e-84f1c736d51e@z72g2000hsb.googlegroups.com... Quote: On May 26, 11:01 am, "Ray O" <rokigawaATtristarassociatesDOTcom wrote: uric...@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. The part about "your mileage may vary" also applies to the use of regular or mid grade fuel instead of premium. When you use lower octane fuel, the engine knock sensors may detect knocking and retard ignition timing, which will reduce the power the engine produces, which may reduce fuel economy. Calculate the fuel economy you are getting with premium on a cost per mile basis and compare with what you get with regular or mid-grade fuel. I've found that fuel economy goes down a little with regular, so that on a cost per mile basis, there is no difference between regular and premium except for the slight loss of performance. -- Ray O (correct punctuation to reply) I heard that too, Ray, but at my 20K service stop, the Lexus rep recommended I switch my 2006 GS300 engine from premium to regular. My beef was actually sooty tailpipes, even though the car does not use oil. Three things: (1) yes, some loss of power when not downshifting, (2) no more hesitation when I stop quickly and try to step on the gas immediately, like at a stop sign when there is no oncoming traffic, and (3) about 10% better mileage on the highway... I could not believe it, I thought maybe because the knock sensor had not reset itself for less timing advance, when I switched to regular, but after almost 14000 miles on regular, I cannot say I regret going to regular. Now I may reduce engine valve life, because I think regular burns hotter, but I do not plan to keep the car beyond 75K. Would appreciate your feedback on my comments Ray! BTW, my tailpipes are as sooty as ever, but I notice all GS300 have sooty tailpipes.. Switching from regular to premium or vice versa should not have any effect on the amount of soot visible in the tail pipes. Using regular will not reduce engine valve life. The notion that regular burns hotter than premium is an urban legend. Regular and premium fuel have the same BTU content and burn at pretty much the same temperature. The difference between regular and premium is in the additives and octane, which reduces the fuel's tendency to detonate under compression. If you switch from premium to regular, the ECU will reduce timing advance as soon as it detects a signal from the knock sensors. If you accelerate slowly and don't put a load on the engine, the ECU may never reduce timing advance. If you switch from regular to premium, it will take roughly 2 tanks of fuel for the ECU to start to advance timing again. -- Ray O (correct punctuation to reply) Back to top   Ads Advertising Sponsor kitzler Guest Posted: Wed May 28, 2008 1:00 pm    Post subject: Re: Gas for 07 Lexus 350 On May 27, 11:07 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote: Quote: "kitzler" <nja...@optonline.net> wrote in message news:1a10a7c3-81a7-44ba-b39e-84f1c736d51e@z72g2000hsb.googlegroups.com... On May 26, 11:01 am, "Ray O" <rokigawaATtristarassociatesDOTcom wrote: uric...@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. The part about "your mileage may vary" also applies to the use of regular or mid grade fuel instead of premium. When you use lower octane fuel, the engine knock sensors may detect knocking and retard ignition timing, which will reduce the power the engine produces, which may reduce fuel economy. Calculate the fuel economy you are getting with premium on a cost per mile basis and compare with what you get with regular or mid-grade fuel. I've found that fuel economy goes down a little with regular, so that on a cost per mile basis, there is no difference between regular and premium except for the slight loss of performance. -- Ray O (correct punctuation to reply) I heard that too, Ray, but at my 20K service stop, the Lexus rep recommended I switch my 2006 GS300 engine from premium to regular. My beef was actually sooty tailpipes, even though the car does not use oil. Three things: (1) yes, some loss of power when not downshifting, (2) no more hesitation when I stop quickly and try to step on the gas immediately, like at a stop sign when there is no oncoming traffic, and (3) about 10% better mileage on the highway... I could not believe it, I thought maybe because the knock sensor had not reset itself for less timing advance, when I switched to regular, but after almost 14000 miles on regular, I cannot say I regret going to regular. Now I may reduce engine valve life, because I think regular burns hotter, but I do not plan to keep the car beyond 75K. Would appreciate your feedback on my comments Ray! BTW, my tailpipes are as sooty as ever, but I notice all GS300 have sooty tailpipes.. Switching from regular to premium or vice versa should not have any effect on the amount of soot visible in the tail pipes. Using regular will not reduce engine valve life. The notion that regular burns hotter than premium is an urban legend. Regular and premium fuel have the same BTU content and burn at pretty much the same temperature. The difference between regular and premium is in the additives and octane, which reduces the fuel's tendency to detonate under compression. If you switch from premium to regular, the ECU will reduce timing advance as soon as it detects a signal from the knock sensors. If you accelerate slowly and don't put a load on the engine, the ECU may never reduce timing advance. If you switch from regular to premium, it will take roughly 2 tanks of fuel for the ECU to start to advance timing again. -- Ray O (correct punctuation to reply) Thanks for your feedback Ray! /kitzler Back to top   Ads Advertising Sponsor trailer Guest Posted: Thu May 29, 2008 1:04 am    Post subject: Re: Gas for 07 Lexus 350 since purchasing my 2007 RX350 new, I haven't used anything but premium. if you believe the display, the car gets anywhere from 21-23 mpg, mostly city driving. since I don't put a lot of miles on the car, I have never used regular. I don't know about the accuracy of the MPG display. now approaching 15k miles on odometer. my $.02. <urickcw@verizon.net> wrote in message news:ndal34d5e3mu5rqu0djj71v9cjj91i8kpt@4ax.com... I have a 2007 Lexus 350 which the dealer and car manual recommends premium gasoline. Has anyone tried regular or plus or a mixture of either? I live in the Northern Virginia area and "supposedly" be blends of gasoline are somewhat different for this metropolitan area. Appreciate any feedback. Back to top   Ads Advertising Sponsor Ray O Guest Posted: Thu May 29, 2008 9:54 am    Post subject: Re: Gas for 07 Lexus 350 "kitzler" <njanus@optonline.net> wrote in message news:be39f7d3-38c6-4594-a495-26a680e178d1@k37g2000hsf.googlegroups.com... <snipped> Quote: Thanks for your feedback Ray! /kitzler You're welcome! -- Ray O (correct punctuation to reply) Back to top   Ads Advertising Sponsor Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         Auto Insurance Forum Index -> Lexus All times are GMT Goto page 1, 2  Next Page 1 of 2   Jump to: Select a forum Auto Insurance----------------Auto InsuranceLexus4x4Classic Cars  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum 106 Attacks blocked Powered by phpBB © 2001, 2005 phpBB Group