M135i - Reckon i could get 30 mpg?
Discussion
I'm currently trying to decide what to get for my next daily driver. I've been in diesels for a while now, but with diesel ban zones and just generally missing petrols, i have an itch to go back. However, i do a fair amount of miles, so i'm going to need something that's reasonable on fuel.
So as in the title, can anyone who's owned one tell me if i could get 30mpg from a M135i whilst driving it sensibly? My commute consists mostly of straight forward, traffic free B roads and motorways, and it's always at a relaxed pace. I've been in coupes and saloons for nearly all my driving life, and i've never had a quick hatchback, so it's an itch i'm looking to scratch.
Edit: I'm referring to the older 6cyl M135i's in particular. Will likely end up being a pre-facelift aswell if that makes any odds.
So as in the title, can anyone who's owned one tell me if i could get 30mpg from a M135i whilst driving it sensibly? My commute consists mostly of straight forward, traffic free B roads and motorways, and it's always at a relaxed pace. I've been in coupes and saloons for nearly all my driving life, and i've never had a quick hatchback, so it's an itch i'm looking to scratch.
Edit: I'm referring to the older 6cyl M135i's in particular. Will likely end up being a pre-facelift aswell if that makes any odds.
Edited by CJ22 on Tuesday 15th December 01:03
Not exactly the same I know, but my dad bought an M235i Gran Coupe earlier this year. Regularly gets 30mpg mixed driving. Nudges 40 on longer journeys, and plummets when driving hard.
Impressive really, for a 300bhp car.
Worth noting that this is the 4 cylinder turbo that the current M135i also has. If you're on about the older 6cyl turbos, itll likely be harder to achieve.
Impressive really, for a 300bhp car.
Worth noting that this is the 4 cylinder turbo that the current M135i also has. If you're on about the older 6cyl turbos, itll likely be harder to achieve.
Ah, good point. I am referring to the older 6cyl M135i's. I know the older N52 (albeit a naturally aspirated 6 cylinder) that came in the E92 330i's was able to achieve 30mpg. I'm just wondering if although being turbocharged, with the engine in the M135i being a bit newer they may have been able to squeeze a bit more fuel efficiency out of it.
I have an M140i, so the later B58 and my long term average is 29.4mpg.
I’ve not reset the trip computer since I picked the car up last June. It was hovering just under 31mpg for a while but it’s dropped since I’m not commuting. On longer runs it’s pretty good on fuel but it drops quite quickly on short trips or if driven hard.
The auto box helps quite a bit with economy with the tall 8ty gear.
I’ve not reset the trip computer since I picked the car up last June. It was hovering just under 31mpg for a while but it’s dropped since I’m not commuting. On longer runs it’s pretty good on fuel but it drops quite quickly on short trips or if driven hard.
The auto box helps quite a bit with economy with the tall 8ty gear.
Assuming you can rein yourself in on the single carriageways and your route isn't overly hilly, even in a pre-facelift M135i you'd easily average over 30mpg.
Use the performance more than occasionally and it will drop off significantly though.
As others have said the ZF8 box helps economy at a cruise significantly, though overall I have found over 3 M-lites (one manual and 2 auto) over the last almost 8 years it makes little difference to my overall average which sits at around 26mpg. I'd say on a gentle-ish motorway cruise the auto will easily crack 40mpg where the manual would be 2-3mpg less.
Use the performance more than occasionally and it will drop off significantly though.
As others have said the ZF8 box helps economy at a cruise significantly, though overall I have found over 3 M-lites (one manual and 2 auto) over the last almost 8 years it makes little difference to my overall average which sits at around 26mpg. I'd say on a gentle-ish motorway cruise the auto will easily crack 40mpg where the manual would be 2-3mpg less.
Sounds promising so far!
It would be the auto i'd go for. My current car is an auto, and also the first automatic i've owned. I've found an auto to be a far more relaxing drive, and i'm happy to cruise along for the most part. In a more engaging manual, i'll soon get carried away and the mpg will plummet.
It would be the auto i'd go for. My current car is an auto, and also the first automatic i've owned. I've found an auto to be a far more relaxing drive, and i'm happy to cruise along for the most part. In a more engaging manual, i'll soon get carried away and the mpg will plummet.
Edited by CJ22 on Tuesday 15th December 21:45
I've currently got my 4th manual N52 engined BMW and they have all easily averaged 30+mpg, but here is a link to a thread where a couple of M140i owners have also averaged over 30mpg so I would have thought an M135i should manage it too:- https://www.pistonheads.com/gassing/topic.asp?h=0&...
CJ22 said:
Sounds promising so far!
It would be the auto i'd go for. My current car is an auto, and also the first automatic i've owned. I've found an auto to be a far more relaxing drive, and i'm happy to cruise along for the most part. In a more engaging manual, i'll soon get carried away and the mpg will plummet.
I’ve got an N54 335i with the 6 speed ZF slush box and barely drive on the motorway these days. I get 26MPG so unless you’re treading your commute like the cannonball run I recon you’ll be fine.It would be the auto i'd go for. My current car is an auto, and also the first automatic i've owned. I've found an auto to be a far more relaxing drive, and i'm happy to cruise along for the most part. In a more engaging manual, i'll soon get carried away and the mpg will plummet.
Edited by CJ22 on Tuesday 15th December 21:45
DuckSauce said:
I go most places in eco mode with mine and its very easy to get 30mpg. The downside is the small fuel tank, I'm used to bigger tanks in previous cars.
I get anywhere between 300 and 350 miles to a tank, depends which route I take to work ??
The small tank is a pain the in arse. At first I thought it was brill that it didn’t cost much to fill up....I soon realised that I was just spending more time at the fuel station.I get anywhere between 300 and 350 miles to a tank, depends which route I take to work ??
Court_S said:
The small tank is a pain the in arse. At first I thought it was brill that it didn’t cost much to fill up....I soon realised that I was just spending more time at the fuel station.
Yes, that is a pain. My E87 1 Series and E86 Z4s only had 55 litre tanks, but my E46, E90 and E91 all had 63 litre tanks.
55 litres doesn't go far in a Z4M.
Current long term ave over 20,000 miles is 34.4 mpg. Get an easy 40 mpg at 70mph on the motorway which is 75% of my driving. Good on the open A and B roads but really suffers in stop start traffic. Have seen single digits when pushing on at Brands Hatch. If you are driving it relatively easy you should see 30mpg without any issues.
Pebbles167 said:
Not exactly the same I know, but my dad bought an M235i Gran Coupe earlier this year. Regularly gets 30mpg mixed driving. Nudges 40 on longer journeys, and plummets when driving hard.
Impressive really, for a 300bhp car.
True. I had a M235i before my TTS, and get about 10% better mpg now. Impressive really, for a 300bhp car.
Gassing Station | BMW General | Top of Page | What's New | My Stuff