cered Posted March 12, 2015 Share Posted March 12, 2015 Car: 370BHP BPU-TT VVTI Tiptronic mkiv with 18" alloys. K&N panel filter in OEM airbox and Walbro fuel pump. Having some moderate concern about my Supra, it gotabout 250miles to a full tank of V-Power after being advised it could manage 320miles. Currently its getting around 50-55miles to £20 of BP Ultimate which works out I think 15mpg? I primarily do dual carriageway/motorways miles at the 50-70mph range. The odd footdown moment or two as-well. My first instinct is to run some injector cleaner though it. I've used Wynn's with good results before, any good ones for Supras? or other suggestions to improve economy? Quote Link to comment Share on other sites More sharing options...
supra joe Posted March 12, 2015 Share Posted March 12, 2015 Buy a diesel lol. These cars are not made for economy. Quote Link to comment Share on other sites More sharing options...
cered Posted March 12, 2015 Author Share Posted March 12, 2015 Buy a diesel lol. These cars are not made for economy. Got one, 150 miles for £20 lols. But if there's a problem with the Supra causing poor economy I'd want it fixed (fter reading 20-25mpg si the average on here..) Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 12, 2015 Share Posted March 12, 2015 250 miles is about the norm for a full tank , you could always check your o2 sensor voltage to see if its bad Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 12, 2015 Share Posted March 12, 2015 (edited) With a mixture of driving my UK full bpu TT would do 25 mpg and if taken very sensibly would nudge 30 mpg. I'd check some silly stuff first like tyre pressures and do all the wheels rotate freely, no sticking calipers, if that's all good then its time to look under the bonnet Edited March 12, 2015 by Dnk (see edit history) Quote Link to comment Share on other sites More sharing options...
jamesmark Posted March 12, 2015 Share Posted March 12, 2015 I remember I done a test a while back, and had 2 threads about it. Both results from those tests are in this one thread. http://www.mkivsupra.net/vbb/showthread.php?137119-Supra-MPG-my-results-Part-2 So based on your car being more modified than mine was back then I would say it is about right. Quote Link to comment Share on other sites More sharing options...
jonc Posted March 12, 2015 Share Posted March 12, 2015 Car: 370BHP BPU-TT VVTI Tiptronic mkiv with 18" alloys. K&N panel filter in OEM airbox and Walbro fuel pump. Having some moderate concern about my Supra, it gotabout 250miles to a full tank of V-Power after being advised it could manage 320miles. Currently its getting around 50-55miles to £20 of BP Ultimate which works out I think 15mpg? I primarily do dual carriageway/motorways miles at the 50-70mph range. The odd footdown moment or two as-well. My first instinct is to run some injector cleaner though it. I've used Wynn's with good results before, any good ones for Supras? or other suggestions to improve economy? Mine is a VVTi BPU TT and I use it daily. My commute is all town driving with a small bit of dual carriageway and I get about 250-275 out of a tank. When I used the car on weekly 180 mile trips I could range 290-340 to the tank depending how I drove and how often I spun up both Turbos:d Hope this helps. There are not many that worry about fuel consumption with these cars but its always good to monitor so you know if anything is going wrong. I did reach 30 to the gallon on one trip just to see if it could be done but boy it was boring:taped: Quote Link to comment Share on other sites More sharing options...
Abz Posted March 12, 2015 Share Posted March 12, 2015 I managed roughly 380 to a tank of fuel, that was from London to Lillie in France and local driving there too over 4 days. Wife & daughter were in the car so was taking it easy with a few short pulls. Mine is a VVTi too with a 6 speed. Unless you are doing only local driving and flooring it a lot of the time you shouldn't be getting 15mpg. I would start with the 02 sensors. Quote Link to comment Share on other sites More sharing options...
Mike2JZ Posted March 12, 2015 Share Posted March 12, 2015 I managed roughly 380 to a tank of fuel, that was from London to Lillie in France and local driving there too over 4 days. Wife & daughter were in the car so was taking it easy with a few short pulls. Mine is a VVTi too with a 6 speed. Unless you are doing only local driving and flooring it a lot of the time you shouldn't be getting 15mpg. I would start with the 02 sensors. Admitelly mines only an n/a, but I was only getting 275miles per tank. After changing the o2 sensors I'm getting 350 Quote Link to comment Share on other sites More sharing options...
Thomas.B Posted March 13, 2015 Share Posted March 13, 2015 I had the same with one of my old supras, I changed 02 sensor, plugs and all small things but for me it was the vacuum hoses in the engine bay. I changed all of them and then had half of the consumption! I got around 120 miles on full tank prior to this.... Quote Link to comment Share on other sites More sharing options...
Supraleeturbo Posted March 13, 2015 Share Posted March 13, 2015 Iv managed to get 389mile to a full tank on vpower and that normal and a few pulls Quote Link to comment Share on other sites More sharing options...
Abz Posted March 13, 2015 Share Posted March 13, 2015 Admitelly mines only an n/a, but I was only getting 275miles per tank. After changing the o2 sensors I'm getting 350 I found the NA engine to be more heavy on fuel than both my TT's! Quote Link to comment Share on other sites More sharing options...
mellonman Posted March 13, 2015 Share Posted March 13, 2015 For everyone that gets 350 + miles out of a tank of fuel in a supra I have one thing to say to you all " YOUR DOING IT WRONG , YOUR DRIVING TOO SLOW " Quote Link to comment Share on other sites More sharing options...
TuneR Posted March 13, 2015 Share Posted March 13, 2015 My car is very very similar car to yours mate; BPU (full decat with RR)-TT VVTI Tiptronic mkiv with 18" alloys. K&N panel filter in OEM airbox and Walbro fuel pump. When using mine i usually get 500km +/-50 and thats average driving with about 1bar or boost most of the time. Id definitely think there is something up with the car alright, no harm in running an injector cleaner. Id look at the O2 sensor as mentioned above. I replaced mine even though the old one was working fine, still have the old one i think. Quote Link to comment Share on other sites More sharing options...
Dnk Posted March 13, 2015 Share Posted March 13, 2015 Don't forget that the UK spec had a bigger fuel tank so getting 400 to a tank isn't too hard to do. 25 mpg gets you 385 miles in a UK car Quote Link to comment Share on other sites More sharing options...
Iky Posted March 13, 2015 Share Posted March 13, 2015 Also worth mentioning, some imports may not have the proper conversion in place for the odo. So may actually be clocking in km's and not miles. Approx. 1.6km to a mile. Quote Link to comment Share on other sites More sharing options...
Abz Posted March 13, 2015 Share Posted March 13, 2015 For everyone that gets 350 + miles out of a tank of fuel in a supra I have one thing to say to you all " YOUR DOING IT WRONG , YOUR DRIVING TOO SLOW " Wife & daughter in the car... when I am alone now that's a different story... Quote Link to comment Share on other sites More sharing options...
a98pmalcolm Posted March 13, 2015 Share Posted March 13, 2015 Mine is highly modified at 680BHP but using low revs travelling to work everyday (mainly town driving and a 15 min que every morning) I get avg 240mils a tank. If I do motorway about 310 miles a tank. Quote Link to comment Share on other sites More sharing options...
Chris Wilson Posted March 13, 2015 Share Posted March 13, 2015 Without putting a wide band Lambda sensor on it you won't know if it's too rich anywhere. Big wide tyres do no favours for economy, nor do dragging brakes and funny body kits. It's probably due new oxygen sensors and genuine ones work better than Ebay ones. Driving style will of course affect things. If it's done 100K miles it won't be as economical as a fresh engine. Auto boxes aren't as economical as a well driven manual transmission cars. Blah blah. Quote Link to comment Share on other sites More sharing options...
Westy Posted March 13, 2015 Share Posted March 13, 2015 My black Supra is at more economical than the 1A1. I've seen 400+ miles in the black car per tank doing cross country drives, but lucky to see 250-300 out of the 1A1. Quote Link to comment Share on other sites More sharing options...
cered Posted September 15, 2015 Author Share Posted September 15, 2015 Seems I'm averaging 18mpg with mixed bag driving... New o2 sensor time and go from there Quote Link to comment Share on other sites More sharing options...
herbiemercman Posted September 15, 2015 Share Posted September 15, 2015 My car is the stock 5 speed NA had it from new, does 20mpg on average, may be 24mpg on long journeys, it has 42,000 miles on clock. My brother has a stock TT auto again bought new, 38,000 miles on clock, he has cruise control, 26 mpg local and 34 mpg on long journeys. We took his car to the sle of Man, the TT races and when he was blowing bikes off, foot on floor most of the week the mpg was a joke, circa 12 mpg ish. Let's face it if you nurse these cars for their age and performance and you can average 20 mpg, then this has to be good, 15 mpg is not right, some thing wrong? Quote Link to comment Share on other sites More sharing options...
mellonman Posted September 15, 2015 Share Posted September 15, 2015 There is a simple test to check the o2 sensors, something with the engine bay diagnostic and reading the voltage needs to be between 0.3 and 0.7 iirc Cant remeber the pins though sorry Quote Link to comment Share on other sites More sharing options...
Tricky-Ricky Posted September 15, 2015 Share Posted September 15, 2015 I used to get between 25 and 30MPG from my old Supra both BPU and single turbo...better than the Skyline 350GT I replaced it with. There are two things that effect economy other than whats already been mentioned and they are lambda sensors and ECU coolant temp sensor, both will cause a default rich mixture and mess with fuel economy. Quote Link to comment Share on other sites More sharing options...
cered Posted September 17, 2015 Author Share Posted September 17, 2015 Thanks guys, I need to get it serviced so I think I'll take it down to Whifbitz and get it plugged in while they're at it Quite annoying as my Alfa has a leaking thermostat making the engine run cool/over fuelling too. Team bad MPG Quote Link to comment Share on other sites More sharing options...
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