Post your success stories in this sub-forum

[mpg_numbers_guy]

Nice numbers from the 'stang!

[Mustang Dave]

Thanks!

6 years ago I switched from Motorcraft 5W-30 synthetic blend motor oil to Mobil 1 0W-30 full synthetic motor oil. That change gave me close to .5 MPG.

5 years ago, I installed an under-drive crankshaft pulley. That's a 60+ year old hot-rodding trick to get more power to the wheels by wasting less power driving accessories. (Particularly the water pump and power steering pump.) That gave me about 1 MPG.

Some of my gains can be attributed to engine, drive train, and tire break-in.

But as most members here know, the most significant gains are from adjusting the nut behind the steering wheel.

One thing I forgot to mention:
A lot of members here say that it's bad for fuel economy, but I use cruise control extensively. (Over 90% of the time.)

[jakobnev]

Well I managed to get to the last day of August before I had even a single trip under 50MPG.

A bit of a fail-win: I stretched the tank out so far that it's now going to get ruined by cold weather.

[MetroMPG]

^ You know you're an ecomodder when you think about weather and the timing of your fill-ups!

[MetroMPG]

Congrats, Mustang Dave!


It's fun to get great numbers in an entertaining car, isn't it?

Originally Posted by Mustang Dave

A lot of members here say that it's bad for fuel economy, but I use cruise control extensively. (Over 90% of the time.)

Bad or insignificant depends on a few factors though. I use cruise (when I have it, e.g. in Mirage #1 and #2) pretty regularly, but most of my driving is on pretty flat terrain.

[mpg_numbers_guy]

Cruise control mainly hurts fuel economy when it applies the brakes, or, in an automatic, when it causes an unnecessary downshift.

I actually found that using cruise control on the G2 Prius actually helped me maximize fuel economy, except for steeper downhills where I would let the car coast in D with a bit of regen.

[RedDevil]

Hybrid cars and cruise control seem to match fine. At least in my personal experience.

[GreenTDI]

CC is still my best friend, especially on flat roads with little traffic, I think it's a good way to get decent FE with a small engined car - when P&G isn't really an option.

Had a 49 mile - 78 km trip yesterday at 81.2 MPG or 2.9L/100km. Average speed 51 mph - 82 km/h and mainly with CC on.

[mpg_numbers_guy]

I'd probably install a CC on the Insight except I'm cheap and from what I've read using CC makes it difficult to maximize lean burn time.

[D.O.G.]

Winter has just finished and the i30 has returned a good average.

Having covered 6841km between 3/6 and 4/9 for 399.33l of petrol, that works out to 5.84l/100km or just over 40mpg (US).

For a petrol i30 with the 6 speed auto, that’s pretty good.