11 Tips To Improve Your MPG Fuel Efficiency

If your vehicle is running less economically than it used to, there could be an underlying issue with mechanical parts, electrics or even sensors.

This guide covers SOME of the most likely issues which could be attributed to reduced fuel efficiency.

Possibly the most common cause of poor MPG returns is your driving style and the type of journeys you do.

For example, if you do a lot of stop-start type driving (typically in heavy traffic or traffic jams) or you use the throttle for more rapid acceleration than normal, fuel consumption can increase quite dramatically.

Driving in a hilly area or towing can also have a dramatic effect, these are factors that you may or may not be conscious of all the time due to other things on your mind.

Cars are least efficient during initial acceleration, so if your car journey is short or involves a lot of stops then you will use more fuel than on longer journeys where your speed and acceleration are more constant. 

More aggressive driving where you accelerate hard and brake late uses much more fuel than steady driving.  For best mpg results, try keep your vehicle moving as much as possible by leaving plenty of room between you and the vehicle in front.

Modern vehicles have a mass of sensors, with many being essential to the efficient operation of the engine.

Sensors are designed to send information to your vehicles ECU (brain) where the data lookup tables (MAP software) sensors that become less efficient or inaccurate, feed the ecu with incorrect information and affect performance/efficiency.

MAF (“mass airflow” sensors) play a huge roll in engine efficiency and although they do not always show up on a basic diagnostic test, they can still be responsible for poor efficiency.

Having a dirty or faulty mass air flow sensor can reduce mpg by 20% or more because the sensor provides incorrect information the engine management software, which in turns miscalculates how much fuel is required.

The engine’s thermostat controls the operating temperature of the engine, helping the engine warm up quickly after a cold start.

A faulty thermostat does not close properly, which could mean that the engine never reaches a desired operating temperature, and a cold engine uses more fuel.

Fuel varnish deposits can build up inside fuel injectors which prevents them from delivering the correct volume of fuel, which in turn can cause poor fuel economy.

Engine misfire could be the result of many factors, defective fuel injectors, faulty spark plugs, bad plug wires, fuel injectors, low fuel pressure amongst others but ultimately, will waste fuel and reduce MPG.

If your air filter is partially blocked, it reduces air allowed into the engine and interferes with normal engine performance causing poor fuel economy and general efficiency.


Most modern vehicles use a low viscosity motor oil, that tends to thicken in colder weather conditions.  Using a motor oil with a higher viscosity than you need can cause poor fuel economy, so check your vehicle manual for the correct oil grade required for your engine.


The EGR Valve (Exhaust Gas Recirculation Valve) is a device which is designed to help control emissions.  If the EGR valve is not operating correctly it can allow exhaust gases to leak back into the intake manifold causing misfires and in turn a reduction in mpg.

The type of tyre you use and the pressure can have a major impact on your fuel economy. 

If your tyre pressures are low, rolling resistance is increased and your engine will have to work harder to propel you along.

The harder your vehicle works, the more fuel it will use.

Equally, better quality tyres often have less rolling resistance and therefore are more economical in the long run. For confirmation of this factor visit a well know tyre company site
www.blackcircles.com (we are not affiliated) and check out the ratings for various tyres, which include fuel economy data.

Assuming that all other aspects of your vehicle are in good order, a professional ecu remap can typically improve fuel efficiency by 10-20% or more...

Combine a well-maintained car with a professional ecu remap and improved driving style, and some people could enjoy improvements of up to 30% or more.



WHY DRIVE A STANDARD VEHICLE - When you can enjoy a vastly improved driving experience from just £78 per month over 4-month plan

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Why should you choose MPG Tuning? www.whympg.co.uk

Spread The Cost with Our 4 Month PAYMENT PLANS

With prices starting from only £78 per month on our 4-month payment plan, you can enjoy all of the benefits shown above Now rather than saving up.

“Vehicle Dependent” In some cases, your Saving On Fuel will actually cover the cost of your remap over a year or less, in which case the remap and associated benefits are effectively FREE...

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Why should you choose MPG Tuning? 

IMI Certified Tuning Specialist

MPG Tuning Ltd
Unit 44 Rumerhill Business Estate
Cannock, Staffordshire, WS11 0ET

 Tel: 01543 466662
Mob: 07789 266194



MPG Tuning Offer Professional ECU Remap and Tuning services including but not limited to ECU Remapping, EGR Delete, DPF Solutions, VAG Emissions Recall Scandal Rollback, Tricore Processor Programming, Boot Mode and Traditional Chip Tuning.

MPG Tuning is based in Cannock Staffordshire but serve customers from further afield typically from the following areas, Lichfield, Burntwood, Rugeley, Stafford, Brownhills, Walsall, Wolverhampton, Birmingham, Tamworth plus many more areas throughout the West and East Midlands.


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Choosing a Good Tuner is as important as choosing a Good Doctor.

You will be presented with a bewildering selection of companies, all claiming to be the best in the industry. Unfortunately the industry has been flooded with “Get Rich Quick” merchants all desperate to take your money from you. In many cases the “Get Rich Quick” operators have invested in “Cloned” counterfeit remapping tools off the internet. They have little “if any” industry knowledge, experience or liability insurance…

Don’t get sucked in by a good story and what appears to be an incredible price. Instead of taking the word of self-acclaimed tuning experts, a search on google will reveal some very interesting, yet disturbing facts about a few “so called” professionals. Unlike some testimonials “Bert for Bognor says we are Brill” our customers are real people. Don’t take our word for it, ask the people that know best “Our Customers”

I went for a remap on my T5 as it had an awful flat spot around 2800 rev's I got great personal service and its like having a new engine in the van smooth power and greater economy.... Highly recommended wish I'd done it months ago it would have paid for it self already thanks a lot hills are no longer a drag.

Adrian McManus

Popped in to see Mike on Friday to have my A4 2.0TDi 170hp remapped. Have to say I was a little pessimistic at first having being told by another firm that remaps on these were a nightmare so was expecting the worst! Thankfully, nothing of the sort, straight in, one error message unknown but Mike worked it out and all done in no time. Straight out for a test run and the drive is very different, certainly mid ranged (where these engines seem to suffer) pulls away nicely and can definitely feel the benefit. Best money I've ever spent on a car in, well, forever! Thanks again Mike

Mark Patterson

Had the ECU my 320D remapped by Mike yesterday. Very impressed with the results. Noticed it straight away after having it done. Service was also great, talked me through all of it to get exactly what I wanted out of it. Highly recommend mpg tuning.

James Aston

Took my Civic Mk VIII 2.2 CDTI to Mike following a recommendation from a friend who's had his last few cars remapped at MPG., professional service and answered any questions I had. Customised remap that gave me a good balance between performance and economy. Mike was happy to let me watch the whole procedure and explained what he was doing. Makes a good brew as well! Would highly recommend, Will definitely bring my future motors here.

Dan Wright

Just had the ECU on my BMW 320D remapped and it is absolutely superb the power is unbelievable and the service is outstanding would recommend it to anybody he has transformed my car from 160 bhp to 207 bhp no smoke at all and the power delivery is awesome throughout all of the gears really happy.

Tom Dawson

Had my Astra 1.9cdti remapped here with EGR delete for a great price, I have now got the full power and yes it's rapid lol.... Mike was helpful and talked me through it all and also good after care as well. Thanks again.

Scott Walker

Had my T5 remapped today. Over the moon with the results! Really reasonable price and customer service is second to none! Would highly recommend!

Ethan Tunnicliffe

I had my car remap done and I'm really pleased with MPG Tuning. Great atmosphere, great service and I will recommend it to all my friends. Thank you once again. Renault Megane 2.0 Turbo petrol with 165 hp standard

David Wojtasik

Took my Astra estate for a ecu remap, excellent job feels a lot more responsive!

Umair Khalid

Mike remapped my car. Perfect professional service from start to the end. For less than 2 hours everything was done. If you want a different feeling when you are driving MPG Tuning is your place to go.

Dimitar Dimitrov

My boyfriend has exactly the same car as me 1.5 diesel fiesta, had his remapped and was over the moon with it. I had never thought of having a car remap but after driving his, mine felt heavy and slow so decided to get mine done too, now I am converted I love it even more and I am getting about 80-90 miles per tank better than before, very happy , great friendly service and awesome cuppa while we waited

Kelly Williams

Had my renault van remapped at mpg tuning, awesome power, can now keep up with pigeons, thanks Mike for an excellent job 👍👍



Our lead technician has over 16 years’ experience in the tuning industry and long term connections with some of the Worlds most experienced data programming and tuning specialists. We are extremely passionate about our customer satisfaction and strive for a perfect result every time.

Contact MPG Tuning today to discuss options for a professional ECU remap or Call Us: 01543 466 662