High fuel consumption or normal?

Discussion in 'Megane Discussion' started by TurboFlorio, Jul 2, 2016.

  1. I've got my car for a few months now and I'm always around 21mpg. (13.5L/100km)

    I don't drive on the highway and I'd say half of my mileage is when I take the car for some spirited driving.

    I need a refuel every 365-400kms, 400km is a stretch on reserve.

    So is this normal or should I start looking for a problem?


    When I bought the car I had a dumpvalve removed, is it possible they didn't put it back to stock correctly and this somehow affects mpg? (the backing recirc plate?)
     
  2. 21 is a little low. Should be around 28/29. Has this car been remapped?

    What fuel you putting in? (quality/octane)
     
    Nmp likes this.
  3. Its standard as far as I know, only been using 98 octane
     
  4. I'm averaging around 22mpg in mine. 70perecent of that use is spirited though was lil shocked coming from 987 Cayman S which returned same figures with the same use.
     
  5. I assume were talking about a mk3?

    I get 29mpg average, this is currently over around 3000 miles sine last reset, i drive it pretty tamely though which is why i bought the non-cup varient, although it is mapped to 303bhp
     
  6. Yes it's a mk3, been to renault today and it is in the shop because there was a noise coming from the engine, neither I or the mechanic had an idea what it was. Asked about the maintenance intervals and they claim the car has 20.000km intervals = 12.5k miles
     
  7. Did you see an improvement in mpg after the map?

    Sent from my SM-G920F using Tapatalk
     
  8. Cruise a standard Mk3 at 60 mph after a trip computer reset and you should see about 38 mpg.
     
  9. Okay, good info I'll test when I get the car back, altough I'm pretty sure it will be higher than 38mpg
     
  10. Lower I mean, mpg is confusing if you're used to l/100km
     
  11. I think you were right the 1st time - it should be higher if you do as Aerofoil says.

    60mph on a flat road requires very little throttle input (<10% on RS monitor & c. 20bhp). This will use very little fuel.

    Aerofoil offers opinion based on only what he has read elsewhere; he doesn't actually have a car it seems.
     
    sunnylunn, TurboFlorio and Nmp like this.
  12. It will be a good benchmark test figure.

    About 38 mpg or 7.43 L/100km at 60 mph or 96.5 kph.

    You need a decent run to eliminate a bit of short term variations in road conditions.

    Knowledge is power.........
     
  13. It all just reads like you've googled everything....
     
    Nmp likes this.
  14. I was pleased today to get 30.1MPG on a 100 mile motorway trip , (including a bit of town each end :smiley: ) - 225 PH1
     
    Last edited: Jul 6, 2016
  15. Have you sorted out your confusion over the cruise control and sport modes yet? Not so sure that's on Google.......
     
    P1 MKF likes this.
  16. No confusion on my part.

    You were massively, massively wrong on how the cruise control works. You were so wrong it was blatantly obvious you had never engaged cruise control in a Renault.
     
    Nmp likes this.
  17. You mean the bit where you didn't know you can't have CC in Sport mode and you have to actively physically switch it out before Sport mode is available?

    Anyway we digress. One thing I have noticed though is my 'Like' to 'Post Count' ratio is much, much higher than yours. Quality.
     
    P1 MKF and Xanda73 like this.
  18. Nmp

    Nmp

    What a knob
     
    sunnylunn and Xanda73 like this.
  19. No likes there.

    Looked up Radial G yet?
     
  20. Nmp

    Nmp

    Like I said ,what a knob.
     
    sunnylunn likes this.
  21. You two should get a room and have some sweaty fun!
     
    Trophy Pete likes this.
  22. Can't say a noticed any difference, hadn't had the car very long before i had it mapped though.
     
  23. Over the first 1,000 miles of the 275 I only got 23mpg average so far. I have been using it properly since 600 but only when warm. I guess the engine is tight and has plenty of friction that will get better with time. The other parameter might be the NS2r tyres which are bound to cost 1 or 2 mpg I guess. Still, my M135i returned 28mpg at the same stage of its life and in the same driving patterns...
     
  24. How does the 275 compare to your M135i in terms of performance?
     
  25. Straight line performance feels significantly lower but some of the delta is due to to how tight the Meg's engine still is at 1,000 miles and also placebo as the BMW's smoothness/low down torque kind of enhances the feeling of effortlessness. Braking better in the Meg in terms of raw power and feel/modulation but I am on semis+PFC pads vs OE in the BMW.

    But if you compare lat grip and handling performance the Meg claws it all back and some compared to OE BMW suspension. I was on M4 LCAs at the end and that helped but the Meg is still a better driver's car with a lesser albeit decent engine.

    Traction on a par as the BMW was an open diff.
     
  26. Drifting it back to mpg.

    More effort required, the official Extra-urban mpg is 45.6
     
  27. Thanks for the very thorough analysis, nickfrog! :smile:

    Incidentally, I get around 26mpg on average from town driving. I tried for one week to see what the maximum I could get would be if I drove like Ms Daisy and never went above 2500rpm. I actually managed 37mpg which was pretty amazing but very, very dull!
     
  28. JEEEEEEEEEEEEEEEEESUS Christ Ha Ha, What was that argument about?!?!? Wow, its a thread just about High Fuel Consumption, if you don't agree with someones answer/comment then don't say anything at all, instead of calling someone (not so nice) names. I thought this was a Forum about Megane RS's not a place to call each other names, that's for the school yard :astonished:
     
    Nigelo likes this.
  29. Yes pretty pathetic as 38mpg at 60 constant(ish) seems about right, I didn't see anything offensive in thinking that. I think there is bad blood here that more recent members like me do not quite understand.
     
  30. I've done about 2500 miles in mine and don't see over 30mpg average. That's tank to tank using proper calculations as opposed to the trip.

    I was surprised it was so low given its a brand new car. My old 172 cup would do 40mpg average over a tank and that was giving it some a lot of the time
     
  31. -Jamie-

    -Jamie- RSM Moderator

    I see around 45mpg in mine on a motorway run at ~75ish.

    Not bad for 365bhp
     
  32. I have done some more testing..
    While trying to get good mpg on roads with almost no intersections and little slowing down/accelerating I managed to get a never seen before 31mpg!

    On my normal backroad to work I got 26mpg with also shifting at 2500-2700rpm and keeping speed steady.

    Finally I did quite a bit highway and averaged 30mpg over the trip, speed on Highway was 68-87mph.

    I reset the average Mpg before every one of these trips, didn't do any hard acceleration.
     
  33. Agreed, me too
     
  34. Well like I said, and at the risk of being called pathetic, I think your returns are a little low. Is the servicing up-to-date on the car?

    Without really trying I got 41.5mpg at 60mph after resetting the clock this week. This was over about 8 miles of constant driving but does include a 3/4 mile section up a 1 in 6 or so hill. Without this it was around 45ish.
     
  35. Looks like my ~ 38 mpg @ 60 mph was about right then.

    I like a rough average as it also eliminates any individual errors due to head or tail wind components and other multiple and variable driving conditions.
     
  36. Pff renault and their servicing..

    I thought the car needed service every 10k km, when I bought it I asked 2 different renault dealers about it and they both gave me a service sheet saying intervals are 20k km or 12.5k miles.

    I think this is too much, especially since they don't use full synthetic oil.

    Car now has almost 24k km, at 16.5k it got a oil change and new oil filter.

    According to the spec sheet they gave me they should have replaced the air and interior filter as well, but they didn't as far as I know.

    I checked the air filter yesterday while I was removing the foam and it seems in decent condition, a bit of stuff trapped in it.
     
  37. The general service interval is 12k miles or 20k kms, although there is a none compulsory interim service at half this.

    Modern oil is very good and doesn't need changing as much as maybe some people think, based on old historic oil tech.

    Having said that, if you think the dealers haven't serviced the car properly, maybe get back onto them or call Renault Customers Services?
     
  38. The service was 'free' of charge when I bought it so can't really complain about it. I'll probably swap the filters myself.
     
  39. Saw mid 33/34mpg on a trip down south a while ago, full of luggage and 3-up.

    Average is 26-27mpg.
     

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