E39 535i MPG observations
E39 535i MPG observations
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fwaggie

Original Poster:

1,644 posts

231 months

Wednesday 28th December 2011
quotequote all
Drove up to my sisters family for christmas as usual.

280 miles to her house and then to a petrol station, 240 miles back on the next tank.

On the way there: M1, M6, M6 toll, little bit of A road twisties. The reverse on the way back.

On the way there all motorway driving at 55 or very slightly more.
(If I'm not bored/tired/in a hurry I like to sit at a speed where I don't have to overtake anything)

280 miles, 55mph, 29.6mpg. (on board meter said 33.2)

Coming back, as an mpg experiment I sat at between 80 and 90 on the motorways all the way back. (the M6 and M1 are private roads right?)

240 miles, 85mph, 28mpg. (on board meter said 28.8)


1.6mpg difference!


In future I shall tell James not to hold the horses when traversing our empires arteries.

MattOz

4,021 posts

295 months

Wednesday 28th December 2011
quotequote all
My E39 M5 was very similar. Pussy footing around would give me about 23mpg. Using it "normally" would give 21mpg. Absolutely not worth trying to conserve fuel as the frustration of driving conservatively isn't offset by the saving at the pump.

4rephill

5,171 posts

209 months

Wednesday 28th December 2011
quotequote all
fwaggie said:
.........

On the way there all motorway driving at 55 or very slightly more.
(If I'm not bored/tired/in a hurry I like to sit at a speed where I don't have to overtake anything).......
I bet the truck drivers must love you as they close in whilst bouncing off their 56 mph limiters!

(As must the rest of the motorway traffic as the get caught up behind the truck in lane two as it takes 20 miles to crawl past you!)


fwaggie

Original Poster:

1,644 posts

231 months

Wednesday 28th December 2011
quotequote all
4rephill said:
fwaggie said:
.........

On the way there all motorway driving at 55 or very slightly more.
(If I'm not bored/tired/in a hurry I like to sit at a speed where I don't have to overtake anything).......
I bet the truck drivers must love you as they close in whilst bouncing off their 56 mph limiters!

(As must the rest of the motorway traffic as the get caught up behind the truck in lane two as it takes 20 miles to crawl past you!)
Heh.

If I saw any trucks that were almost the same apeed as me I gave the cruise control a couple of taps to slow down a little, let them pass easily and tapped back up to the previous speed.

Ditto for the very infrequent overtakes.

As to the MLMs who are too stupid to use the third lane, I care not a jot about them smile

sparks_E39

12,738 posts

244 months

Thursday 29th December 2011
quotequote all
If I take it easy in my E39 528 auto it gets 35-38 mpg on long trips (and a few times over 40 mpg) , push it and it's about 32-34. It refuses to average below 30 mpg on longer trips no matter how hard I push.

Nigel Worc's

8,121 posts

219 months

Thursday 29th December 2011
quotequote all
sparks_E39 said:
If I take it easy in my E39 528 auto it gets 35-38 mpg on long trips (and a few times over 40 mpg) , push it and it's about 32-34. It refuses to average below 30 mpg on longer trips no matter how hard I push.
Very similar with mine, they are surprisingly efficient

steve_n

444 posts

233 months

Thursday 29th December 2011
quotequote all
Why not go that extra 1mph and be the same speed as the lorries? Going 55 and letting lorries past is the silliest thing I've heard all week!

Less overtakes all round and negligible fuel difference, maybe even improved with gearing vs power band.

The third lane usually drops below 70 when the lorries come out.