rishithen7 Posted March 29, 2008 Share Posted March 29, 2008 what gas will make the lexus is 250 perform the fastest, best, etc? Shell, BP, Exxon, Chevron? Quote Link to comment Share on other sites More sharing options...
joeb427 Posted March 29, 2008 Share Posted March 29, 2008 I don't know about and 'fast' benefit but I use Top Tier fuel rated Shell 93 V-Power. Quote Link to comment Share on other sites More sharing options...
Gaugster Posted March 30, 2008 Share Posted March 30, 2008 It is hard to tell the difference between gases that are used in the IS. It's fuel injected and can make adjustments good or bad. I can add my experience with a carbureted V-TWIN motorcycle but obviously it a difference machine in every aspect. Also, what is your criteria? Fastest initial, Best for cleaning the internals over time etc.... So anyway - I have a motorcycle with a high compression ratio as well as very high cranking pressure. The calculated CR is 10.6 : 1 and the measured CP is ~240psi. The IS250 CR is 12 : 1 and the CP is specified at 199 psi for reference. Basically, my bike is very sensitive to the octane of the fuel. Excluded high octane race fuels, this bike runs best IMO on 93 octane from the Mobile stations around here. So I would rate this gas as my preference over Shell, BP, Marathon, 76, Clark etc... Overall, I am happy if I can use Mobile, Shell or BP for any of my vehicles. My 2 cents, Quote Link to comment Share on other sites More sharing options...
bartkat Posted March 30, 2008 Share Posted March 30, 2008 You won't be able to measure the difference between major brand gas. Quote Link to comment Share on other sites More sharing options...
Sidney07 Posted March 30, 2008 Share Posted March 30, 2008 ^^^+1 I've heard so many stories about gas. As if some of the major brands are going to put inferior gas out there....Barkat speaks the truth! Quote Link to comment Share on other sites More sharing options...
Lexusfreak Posted March 30, 2008 Share Posted March 30, 2008 I can't speak for the folks in the U.S.....but we have 4 major brands in Ontario (sunoco, shell, petro canada & esso)....they evaluated the quality of them.....by far the 2 best in order were sunoco & shell. The other 2 (especially esso) had a much higher sulphur content (PPM). Sunoco & Shell are the only 2 I use up here......I like Shell, Chevron & Texaco south of the border. Quote Link to comment Share on other sites More sharing options...
joeb427 Posted March 30, 2008 Share Posted March 30, 2008 ^^^+1I've heard so many stories about gas. As if some of the major brands are going to put inferior gas out there....Barkat speaks the truth! Some gas brands are better than others. http://www.toptiergas.com/ http://www.toptiergas.com/why.html http://www.toptiergas.com/retailers.html Quote Link to comment Share on other sites More sharing options...
Knightshade Posted March 30, 2008 Share Posted March 30, 2008 Honestly, the top tier thing is a marketing gimmick. -all- gasoline sold in the US is required to meet a set of minimum standards that insures it won't mess your car up. Here's a nice USA Today article on it, where plenty of qualified folks say it's hype- http://www.usatoday.com/money/industries/e...nterstitialskip I wouldn't say buy Smiley brand gas all the time, but there's no reason to avoid Mobil because they're not buying into the top tier gimmick. Quote Link to comment Share on other sites More sharing options...
joeb427 Posted March 30, 2008 Share Posted March 30, 2008 Honestly, the top tier thing is a marketing gimmick.-all- gasoline sold in the US is required to meet a set of minimum standards that insures it won't mess your car up. Here's a nice USA Today article on it, where plenty of qualified folks say it's hype- http://www.usatoday.com/money/industries/e...nterstitialskip I wouldn't say buy Smiley brand gas all the time, but there's no reason to avoid Mobil because they're not buying into the top tier gimmick. I stay with Shell if I can but will use other name brands without worry.I just don't use off brands. Quote Link to comment Share on other sites More sharing options...
rishithen7 Posted March 30, 2008 Author Share Posted March 30, 2008 ^^^+1I've heard so many stories about gas. As if some of the major brands are going to put inferior gas out there....Barkat speaks the truth! Some gas brands are better than others. http://www.toptiergas.com/ http://www.toptiergas.com/why.html http://www.toptiergas.com/retailers.html thanks man I always try to stick with shell b/c of the v power...good to know its on the list. chevron is good but it makes car run a lil slower...dono why. Quote Link to comment Share on other sites More sharing options...
Idoktr Posted March 31, 2008 Share Posted March 31, 2008 ^^^+1I've heard so many stories about gas. As if some of the major brands are going to put inferior gas out there....Barkat speaks the truth! Some gas brands are better than others. http://www.toptiergas.com/ http://www.toptiergas.com/why.html http://www.toptiergas.com/retailers.html thanks man I always try to stick with shell b/c of the v power...good to know its on the list. chevron is good but it makes car run a lil slower...dono why. Stay with the major brands !!! Quote Link to comment Share on other sites More sharing options...
ar39 Posted March 31, 2008 Share Posted March 31, 2008 I've observed better mileage with Sunoco Ultra 93. Performance wise I couldn't tell the difference between the brands. Sunoco - 27+ mpg Shell & Exxon - 26+ mpg BP - 25 - 26 mpg Miles driven on the same route with very similar conditions Quote Link to comment Share on other sites More sharing options...
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