Mk5 GTI fuel consumption

[neilw]

Just checked. I stand corrected. Ignore me! 

[Oldy]

Some guys on here are achieving mpg I never can.  I cannot get more than 30 mpg and tbh its nearer 28.  Perhaps too heavy a right foot!

[rich83]

Just checked. I stand corrected. Ignore me! 

 

[pudding]

Some guys on here are achieving mpg I never can.  I cannot get more than 30 mpg and tbh its nearer 28.  Perhaps too heavy a right foot!

Nagging wives, or they drive like one? 

Tbh, the only time I ever check the mpg is when these threads come up, and it's never surprised me with more than 27, not even on my birthday.  Ungrateful feckin car.

[mikezs]

It would be interesting to see what each persons car does when you try to do a control test, e.g. Flat road, warm day (18-22 indicated), low wind, 50mph cruise control (clocks indicated, not gps) on for 60 seconds.

Would things like oil quality, oil age, spark plugs, air filter, fuel used, tyres/wear and mods effect them drastically.

I propose the 5GGSFT (MK5 Golf GTI Standard Fuel Test) where you reset your computer and drive for 50 seconds under the conditions listed, describe the items listed above and we can compare the results.

[Oldy]

I would "fail" the test immediately - Flat road, warm day - 50 mph - no, would never keep the car at that low a speed - it would sulk (and me too!!)

[lukemk5gti]

Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Thicker oil should actually increase fuel economy, not decrease it.

5-40 is thinner than 5-30 at operating temperature. I watched an "Engineering Explained" Youtube video on Oil viscosity and the differences between Fully Synthetic and semi synthetic

No

Saw this and immediately dropped my jaw.

A guy on the internet through a friends dog told me that once his oil was better if you added coolant to reduce viscosity.

[pudding]

Changing the PCV to the latest R revision and a switch to 5w40 quantum oil made a big difference in my fuel economy, i can easily get 37-39mpg cruising - i still need to remove my pre cat too

Thicker oil should actually increase fuel economy, not decrease it.

5-40 is thinner than 5-30 at operating temperature. I watched an "Engineering Explained" Youtube video on Oil viscosity and the differences between Fully Synthetic and semi synthetic

No

Saw this and immediately dropped my jaw.

A guy on the internet through a friends dog told me that once his oil was better if you added coolant to reduce viscosity.

Yeah and his friend's Orangutan once told me that 50:50 olive oil and Flora buttery is simply the best lubricant you can get.

On a more serious note, there are people out there who still take the term 'fill the engine with oil' quite literally!

[unzippy]

Could you have a map dependant on gear?

Stage what ever for 1/2/3/4/5 and then granny mode for 6th motorway work?

[pudding]

Could you have a map dependant on gear?

Stage what ever for 1/2/3/4/5 and then granny mode for 6th motorway work?

No need mate. Maps are self regulating. Tiny throttle inputs = tiny amounts of fuel injected.

You could of course fit the 6th gear from a diesel gearbox but the huge rpm drop from 5th to 6th will be annoying.

[AJP]

I find it amusing that these threads get so much attention.

If there's any modern-ish, decent looking, affordable, quick car, that doesn't drink like Bill Werbenuik, it's the mk5 GTI.

Drive the f*cker how you feel. It won't bankrupt you. Drive it hard. It's fun. If you really need to save money, or you're 'on fumes', rest assured you can get a good few miles out of very few litres - assuming everything is working as intended.

It really is a non-issue.

[Oldy]

@AJP = I Couldn't agree more.  I admit that when on the "right" road and in the "right" (or at least acceptable) conditions I am an enthusiastic driver.  After all that is what the gti is built for, and when it gives the best rewards.  Quite frankly I don't give a stuff for mpg.  If  that is your goal then tbh the gti isn't the right car for you.  That said, however, for mechanical numpties like me, changes in mpg can be (amongst other symptoms) a useful sign that "all is not well".

[grey golfster]

I'm definitely with AJP & Oldy! 

Always astounds me how much attention an MPG thread gets on a performance car forum! Even more so given the minimal milages that most cars in here seem to cover (imho 10k pa is LOW mileage! You're not even average until 12-15k pa!). Plenty of people out there doing 20k + pa.

Drive it, enjoy it! Honestly, Fuel really is not that expensive compared to the other motoring costs that we face.
However, it won't be many years before these sorts of cars are banned by the enviromentalists, and we're condemend to driving a feckin Nissan Leaf powered off a windmill! If you're allowed to drive yourself at all!

Relative cost of fuel (like interest rates) is disproportionately low atm.

These cars offer fantastically good fuel consumption for their level of performance. I can get >30 mpg out of my stg 2 n a bit Eddy at 70 on the Mway.
Rant over.......for now
 
The above, Unles you are lucky enough to have one of those original, mint, super low mileage Eddy's - in that case store it,  buy another cheap one and thrash that! 

[rich83]

Literally couldn't give a flying f*ck about MPG. At the moment I think my average has slipped to about 21-22MPG.

Wanna chase MPG? Get a 1.9 TDI VAG and pump the tyres up to 100PSI 

[SurreyED30]

Literally couldn't give a flying f*ck about MPG. At the moment I think my average has slipped to about 21-22MPG.

Wanna chase MPG? Get a 1.9 TDI VAG and pump the tyres up to 100PSI 

Ive just read this thread and you have used near enough the same words i was about to type 

if your really that bothered about mpg you shouldn't have purchased a hot hatch, go buy a diesel