Regular gas or Premium? (1 Viewer)

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I have an 06 and filled it up with 87 since premium is now 4.65 per gallon in SF BayArea . Noticeable difference in power loss. Sluggish throttle response.
Going back to Premium. My VVTi does not like Regular

goddam 4.65.... currently here at east bay prices are hovering $3.56... ive been filling up 87 for a few months now and i have no ill effect... i keep below 3k RPM anyways usually letting it shift around 2k... moving 33"s + lift + sliders averages me around 14 mpg city.
 
Well since I started this thread I filled up with Premium today, I will run several tanks and see if there is any difference... paid $3.14 a gallon
 
I’m glad you can afford premium gas. Regular is $3.89 in my neighborhood.
 
Premium is like $4.19
 
MileageTripGallonsCostPer GallonTrip MPGAdjusted MPGOctaneSummary
17984620.663$50.81$2.46Miles Per Year:11,110
18009625020.88$45.50$2.1812.0Total Miles:26,403
18032623018.497$44.37$2.4012.413.0493Average MPG:13.87
18061929318.334$45.08$2.4616.016.7687Adjusted MPG:14.55
18086524616.276$39.05$2.4015.115.8593Average Trip:206
18100914412.936$32.84$2.5411.111.6887Cost Per Mile:$0.20
18130930019.537$51.95$2.6615.416.1193Gas Cost Per Month$186.55
18159528618.402$44.15$2.4015.516.3093
18187027519.773$51.39$2.6013.914.5993
18208021016.047$40.10$2.5013.113.7393
18240532519.228$44.59$2.3216.917.7387
18264824315.298$35.17$2.3015.916.6687
1828011539.465$21.38$2.2616.216.9687
18302422313.889$34.99$2.5216.116.8487
18320017610.94$27.34$2.5016.116.8893
18342122115.599$39.29$2.5214.214.8693
18375032918.919$48.04$2.5417.418.2487
18392817810.615$25.89$2.4416.817.5987
18420627816.565$41.73$2.5216.817.6093
18442822216.209$44.88$2.7713.714.3793
18473730919.456$49.01$2.5215.916.6693
18487613911.274$28.17$2.5012.312.9387
1850211459.654$23.35$2.4215.015.7693
185072514.307$12.14$2.8211.812.4293
185148765.388$14.87$2.7614.114.8092
18532517713.185$32.95$2.5013.414.0893
18565533020.291$44.62$2.2016.317.0687
185691364.958$13.88$2.807.37.6291*lift installed*
18594325215.725$39.30$2.5016.016.8193
1860481058.605$21.50$2.5012.212.8093
18627122313.793$35.99$2.6116.216.9693
18643116010.655$28.76$2.7015.015.7593
186500696.358$17.16$2.7010.911.3893
18678628618.109$45.25$2.5015.816.5793
18694015413.532$33.82$2.5011.411.9493
18724230216.423$36.11$2.2018.419.2991
18738614411.09$31.04$2.8013.013.6293
18757418814.963$41.88$2.8012.613.1891
18786128713.226$33.71$2.5521.722.7693
18797010912.638$39.67$3.148.69.0593
18816319314.469$42.49$2.9413.313.9993
18840924619.011$55.87$2.9412.913.5793
18855614711.11$34.99$3.1513.213.8893
188641855.957$18.76$3.1514.314.9793
18891026917.659$46.96$2.6615.215.9893
18906615614.227$38.40$2.7011.011.5093
18934427817.762$50.60$2.8515.716.4293
18962428018.744$50.59$2.7014.915.6793
18980518114.293$43.58$3.0512.713.2893
19003422916.252$43.05$2.6514.114.7893
19023319913.975$37.02$2.6514.214.9493
19056232919.241$60.40$3.1417.117.9491
1907031419.018$29.03$3.2215.616.4091
19101130819.472$54.50$2.8015.816.5993
19117116014.019$44.01$3.1411.411.9793
19145628518.369$55.09$3.0015.516.2893
1915611058.391$24.83$2.9612.513.1393
19176120012.896$33.52$2.6015.516.2793
19196019913.982$43.61$3.1214.214.9393
19212616610.667$31.67$2.9715.616.3291
192191654.977$15.03$3.0213.113.7091
19247628520.202$52.50$2.6014.114.8093
19260012411.32$29.42$2.6011.011.4993
19274214212.894$33.51$2.6011.011.5593
 
MileageTripGallonsCostPer GallonTrip MPGAdjusted MPGOctaneSummary
19293419214.229$41.82$2.9413.514.1592
19320126720.37$55.79$2.7413.113.7593
19344924820.852$62.12$2.9811.912.4893Score
19366121218.44$54.93$2.9811.512.0693Score
19395329219.653$58.94$3.0014.915.5993Gulf
19418222916.536$53.23$3.2213.814.5391
19448730521.39$57.73$2.7014.314.9693
19461012310.329$27.86$2.7011.912.4993
19479018014.727$39.75$2.7012.212.8293
19502923920.217$54.57$2.7011.812.4093
19525122219.981$55.53$2.7811.111.6593
19546721618.766$54.78$2.9211.512.0793
1955761099.931$30.38$3.0611.011.5193
195667917.843$23.02$2.9411.612.1793
19586820113.549$39.82$2.9412.312.9393
19613326516.245$53.27$3.2816.317.1191Conoco
19644631320.902$61.43$2.9415.015.7193
19667723119.683$59.03$3.0011.712.3193
19689722019.438$56.74$2.9211.311.8793
19714524820.841$62.92$3.0211.912.4893
19735921416.33$59.75$3.6613.113.7593
19766030120.746$70.52$3.4014.515.2287
19791425418.383$56.23$3.0613.814.4993
19817926519.047$56.55$2.9713.914.5987
19836919012.244$41.62$3.4015.516.2893
19856219313.668$49.19$3.6014.114.8193
19881825618.147$59.14$3.2614.114.8093
1989241068.508$25.18$2.9612.513.0793
198980565.056$14.66$2.9011.111.6293
19926528517.293$60.16$3.4816.517.2991
199329644.297$15.16$3.5314.915.6291
19963030120.708$61.90$2.9914.515.2593
19984521518.378$56.22$3.0611.712.2793
20005320815.108$51.50$3.4113.814.4493
20029424118.46$54.99$2.9813.113.6993
2004391459.344$29.33$3.1415.516.2893
20070026119.048$64.74$3.4013.714.3793
200790907.054$25.39$3.6012.813.3893
20107128119.232$57.29$2.9814.615.3393
20128621514.308$42.34$2.9615.015.7693
20143114510.567$35.18$3.3313.714.3993
20164321213.534$41.40$3.0615.716.4393
20190726415.98$51.12$3.2016.517.3393
2020651589.998$32.98$3.3015.816.5893
20221014510.447$29.45$2.8213.914.5692
2023271177.88$18.12$2.3014.815.5887
20256724015.41$52.07$3.3815.616.3493
20278021317.309$50.52$2.9212.312.9193
2029221429.624$30.69$3.1914.815.4893
20313721515.569$49.96$3.2113.814.4991
20327013310.659$35.16$3.3012.513.0993
203364947.439$19.71$2.6512.613.2687
20361224816.324$35.90$2.2015.215.9487
20378617416.538$36.37$2.2010.511.0487
20399420817.297$50.14$2.9012.012.6187
20425025620.541$42.29$2.0612.513.0787
204331818.747$18.19$2.089.39.7187
20450217115.179$32.16$2.1211.311.8287
20471821619.201$44.14$2.3011.211.8087
20501930120.891$47.61$2.2814.415.1187
20528426520.235$44.50$2.2013.113.7487
20557729318.864$41.48$2.2015.516.2987
20586228518.819$41.38$2.2015.115.8987
20605619418.262$40.89$2.2410.611.1487
20624919318.484$45.45$2.4610.410.9587
 
MileageTripGallonsCostPer GallonTrip MPGAdjusted MPGOctaneSummary
19293419214.229$41.82$2.9413.514.1592
19320126720.37$55.79$2.7413.113.7593
19344924820.852$62.12$2.9811.912.4893Score
19366121218.44$54.93$2.9811.512.0693Score
19395329219.653$58.94$3.0014.915.5993Gulf
19418222916.536$53.23$3.2213.814.5391
19448730521.39$57.73$2.7014.314.9693
19461012310.329$27.86$2.7011.912.4993
19479018014.727$39.75$2.7012.212.8293
19502923920.217$54.57$2.7011.812.4093
19525122219.981$55.53$2.7811.111.6593
19546721618.766$54.78$2.9211.512.0793
1955761099.931$30.38$3.0611.011.5193
195667917.843$23.02$2.9411.612.1793
19586820113.549$39.82$2.9412.312.9393
19613326516.245$53.27$3.2816.317.1191Conoco
19644631320.902$61.43$2.9415.015.7193
19667723119.683$59.03$3.0011.712.3193
19689722019.438$56.74$2.9211.311.8793
19714524820.841$62.92$3.0211.912.4893
19735921416.33$59.75$3.6613.113.7593
19766030120.746$70.52$3.4014.515.2287
19791425418.383$56.23$3.0613.814.4993
19817926519.047$56.55$2.9713.914.5987
19836919012.244$41.62$3.4015.516.2893
19856219313.668$49.19$3.6014.114.8193
19881825618.147$59.14$3.2614.114.8093
1989241068.508$25.18$2.9612.513.0793
198980565.056$14.66$2.9011.111.6293
19926528517.293$60.16$3.4816.517.2991
199329644.297$15.16$3.5314.915.6291
19963030120.708$61.90$2.9914.515.2593
19984521518.378$56.22$3.0611.712.2793
20005320815.108$51.50$3.4113.814.4493
20029424118.46$54.99$2.9813.113.6993
2004391459.344$29.33$3.1415.516.2893
20070026119.048$64.74$3.4013.714.3793
200790907.054$25.39$3.6012.813.3893
20107128119.232$57.29$2.9814.615.3393
20128621514.308$42.34$2.9615.015.7693
20143114510.567$35.18$3.3313.714.3993
20164321213.534$41.40$3.0615.716.4393
20190726415.98$51.12$3.2016.517.3393
2020651589.998$32.98$3.3015.816.5893
20221014510.447$29.45$2.8213.914.5692
2023271177.88$18.12$2.3014.815.5887
20256724015.41$52.07$3.3815.616.3493
20278021317.309$50.52$2.9212.312.9193
2029221429.624$30.69$3.1914.815.4893
20313721515.569$49.96$3.2113.814.4991
20327013310.659$35.16$3.3012.513.0993
203364947.439$19.71$2.6512.613.2687
20361224816.324$35.90$2.2015.215.9487
20378617416.538$36.37$2.2010.511.0487
20399420817.297$50.14$2.9012.012.6187
20425025620.541$42.29$2.0612.513.0787
204331818.747$18.19$2.089.39.7187
20450217115.179$32.16$2.1211.311.8287
20471821619.201$44.14$2.3011.211.8087
20501930120.891$47.61$2.2814.415.1187
20528426520.235$44.50$2.2013.113.7487
20557729318.864$41.48$2.2015.516.2987
20586228518.819$41.38$2.2015.115.8987
20605619418.262$40.89$2.2410.611.1487
20624919318.484$45.45$2.4610.410.9587
How on earth did you manage 9mpg one tank? A lot of idling?
 
I always get regular, I checked the mpg and how it ran against premium and didn’t notice a difference in performance and barely if anything in mpg. Decided it wasn’t worth it. Stock 2004 GX470
 
For 03-04 the engines did not have VVT-i and the owners manual calls for regular gas so no reason to put premium in. Starting in 05-09 the engine was changed to include VVT-i. The owners manual for these calls calls for premium but also says regular can be used temporarily if premium is not available. I'd be most interested to hear from people with an 05-09 who have been using regular have been seeing. Personally I always put premium in my 08
 
For 03-04 the engines did not have VVT-i and the owners manual calls for regular gas so no reason to put premium in. Starting in 05-09 the engine was changed to include VVT-i. The owners manual for these calls calls for premium but also says regular can be used temporarily if premium is not available. I'd be most interested to hear from people with an 05-09 who have been using regular have been seeing. Personally I always put premium in my 08

I have 05. I use regular exclusively. Tried premium....no noticeable difference.
 
This topic keeps has come up before. Please refer to the thread: GX470 - premium fuel??

Bottom line: most people notice no difference between premium and regular on all years. Some did report slight acceleration stepping on 87 and not on 91.
 

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