Q&A;: Wrong speedo reading
![Number crunch: A Drive test has shown that 93 per-cent of new car speedometers are inaccurate.](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/07/16/5600711/1405498208687.jpg-90x60.jpg)
Wayne's 2005 Toyota Tazz's speedo reads double the speed he is actually travelling.
The truth about car servicing costs
![Money-go-round: Servicing cars is big business for car makers and dealers.](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/07/24/5620867/1406167123984.jpg-90x60.jpg)
DAVID MCCOWEN Drive investigates the complicated world of maintaining your car in tip-top condition.
Q&A;: Winter tyres
![Lambo in the snow
IMG_3169.JPG](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/07/04/5567774/dt_snow-20tyres_320-20140704085448463038-90x60.jpg)
Amanda wants to know what checks do she needs to do when it comes to tyres in the winter?
Q&A;: Uncomfortable car seat
![Q&A thumbs](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/05/30/5469469/corolla-320-90x60.jpg)
The car seat in Bob's 2009 Corolla hurts his back, can anything be done?
Q&A;: Injector cleaner; does it work
![A Mercedes Benz badge
FOR SMH DRIVE 060602
(NO CAPTION INFORMATION PROVIDED)](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/05/16/5430708/dt_mercedes_320-20140516125932167388-90x60.jpg)
Mercedes-Benz put in an injector cleaner in at every service, is it necessary?
What you need to know about E10
![Ethanol](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2011/02/04/2167281/ethanol_320-90x60.jpg)
STEPHEN OTTLEY We answer some common questions about Ethanol blended petrol.
Q&A;: Problems maintaining speed
![ZZZ970108 SUPPLIED MATERIAL
FORD MONDEO](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/04/11/5340846/dt_ford-mondeo_320-20140411100529208195-90x60.jpg)
Alex's 1997 Ford Mondeo is having problems maintaining speed and shakes at high-speeds.
Q&A;: More power but less sporty?
![VW Golf wagon](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/04/11/5340851/golf-wagon_320-90x60.jpg)
Colin's new Golf wagon has more kWs than his previous model but feels less sporty.
Q&A;: Loose wheel nut
![i30 wheel](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/04/04/5322132/i30-wheel-320-90x60.jpg)
RJ is wondering if he should take his i30 to an expert to see if there has been damage done to the car from the wheel nut coming loose.
Q&A;: Excessive use of oil
![2003 Subaru Liberty wagon](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/03/21/5281422/liberty-wagon_320-90x60.jpg)
Desiree's 2003 Subaru Liberty has recentlt been using a lot more oil than usual.
Q&A;: Cold air intakes
![Honda Prelude](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/03/21/5281419/honda-prelude_320-90x60.jpg)
Elliot wants to know if cold air intake will make more power on his 1998 Honda Prelude.
Q&A;: Broken air-conditioning
![test car Proton Gen 2 10th January 2005 NCH GOOD TAST Picture by JAMIE WICKS DIGICAM 035718](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/01/31/5120909/dt_aircon_320-20140131122623188310-90x60.jpg)
Drive Team Jarred's air-conditioning has broken and he believes it is a resistor problem.
Q&A;: Timing belt replacement
![Toyota LandCruiser Prado Grande 2003.jpg
Toyota LandCruiser Prado Grande 2003
Front / side exterior view of silver Toyota Prado
car / desert / 4WD](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/02/28/5211198/dt_prado-lancruiser320-20140227143411109823-90x60.jpg)
Barry is wondering whether he needs to replace his Hydraulic tensioning system on his 2003 Prado to extend the life of his timing belt.
Q&A;: Radio won't turn off
![Commodore](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2014/02/27/5205414/commodore_320-90x60.jpg)
The radio in Darren's Holden Commodore won't turn off even when the car is off.
Q&A;: Which tyres are best for my car?
![AFR FIRST USE ONLY PLEASE AURION AFR 060207 PIC BY JESSICA SHAPIRO... Toyota is set to launch its new Australian built six cyclinder sedan, the Aurion, at the Melbourne International Motor Show on Thursday. Story by Peter Roberts. EMBARGOED until Thursday 9 February, 2006 GENERIC car market, performance, manufacture, auto, wheel, body, tyre, chunky, headlights, drive, travel, muscular, buy, export, sales, sell, local, industry, jobs. AFR FIRST USE ONLY PLEASE SPECIALX 46882](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/12/20/5024739/dt_tyre_320-20131220110524191934-90x60.jpg)
Kevin is looking to reduce the road noise created by his Dunlop tyres.
Q&A;: Am I being overcharged?
![TOYOTA CAMRY FOR SUNDAY DRIVE.
(NO CAPTION INFORMATION PROVIDED)](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/11/29/4965629/dt_98-20camry_320-20131129101115528310-90x60.jpg)
Jim wants to know if he is paying the right price for a replacement drive shaft.
Q&A;: No reversing camera
![Reversing camera](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/11/15/4925789/dt_reversing-camera_320-20131115100530625433-90x60.jpg)
Martin has been waiting a month for Jeep to install a reversing camera which was supossed to come with his Grand Cherokee.
Q&A;: Correct wear-in of bores/piston rings
![engine](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/11/08/4906333/dt_engine_320-20131108123312940309-90x60.jpg)
Daniel is wondering which is the correct way to wear-in the bore/piston rings.
Q&A;: Engine knock?
![Subaru Outbackl](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/11/08/4906446/outback_320-90x60.jpg)
Graham's 2000 Subaru Outback has developed a knock sound from the negine when free revving.
Q&A;: Territory rear suspension
![SX Territory](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/11/01/4882473/sx-territory_320-90x60.jpg)
Stephen's 2006 Territory has developed a rear thump, and he is wondering whether this is a common issue.
Q&A;: Brake light sensors?
![brake light](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/10/25/4859704/dt_brake-light_320-20131025113834961754-90x60.jpg)
John is wondering why brake light sensors aren't installed in all cars as standard.
Q&A;: RX-8 suspension?
![Mazda RX-8](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/10/25/4859689/rx-8_320-90x60.jpg)
Darren is wondering if the 2003 Mazda RX-8s have any common suspension problems?
Q&A;: Engine noise?
![BA Falcon](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/10/18/4840491/ba-falcon-320-90x60.jpg)
Peter's 2003 BA Falcon engine is making a strange sound and he thinks it might be the timing chain.
Do I need premium unleaded?
![Fuel pumps / petrol pumps.](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/09/17/4753704/dt_petrol-pumps_320-20130917103559788707-90x60.jpg)
It's more expensive and claimed to keep your engine in better shape, but do you really need to put premium unleaded in your car? Got a question for Drive's experts? Email qa@drive.com.au
Q&A;: Vinyl wrapping
![viynl wrapping](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/09/06/4724353/dt_viynl-wrapping_320-20130906112323212971-90x60.jpg)
Darren is considering vinyl wrapping but is worried that it may damage his original paintwork.
Q&A;: Bird dropping stains
![birds](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/09/06/4724352/dt_birdsg_320-20130906112727325648-90x60.jpg)
Sue has noticed that her paint work seems to be damaged by bird droppings and is wondering if anything can be done.
Q&A;: Snow chains
![snow chains](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/08/30/4705408/dt_snow-chains_320-20130830103738715865-90x60.jpg)
Drive Team Michaela is wondering whether she needs snow chains for her Subaru Impreza, and if so how to fit them.
Q&A;: Changing Insurance
![insurance](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/08/30/4705370/dt_insurance_320-20130830103317860147-90x60.jpg)
Drive Team Pam is wondering whether it would be beneficial to shop around or stay with the same insurance company.
Q&A;: Steering pulling to the left
![Hyundai steering wheel](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/08/23/4686047/dt_hyundai_320-20130823104806919609-90x60.jpg)
Drive Team Is it true that right-hand drive cars are set-up to pull to the left for safety reasons?
Q&A;: Do airbags have a shelflife
![Airbag](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/08/09/4647507/airbag-_320jpg-90x60.jpg)
Drive Team Do airbags have an expiry date? Or do they need to be serviced?
How to add Bluetooth to older cars
![Illustration: Jeff Durham.](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2013/05/01/4235900/stupid-car-man_320-90x60.jpg)
MATT CAMPBELL You don't need to buy a new car to get the latest gizmos - here's how you can add in-car telephony to your car.
Should I disconnect my batteiy while I'm overseas?
Drive Team A reader asks if it is a good idea to disconnect his car battery while it sits in an airport car park for three-weeks.
E10 fuel a false economy
![caltex-thumb](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2011/08/22/2575080/caltex-thumb-90x60.jpg)
RICHARD BLACKBURN Promised cost savings don’t necessarily add up with ethanol-based fuels.
Q&A;: Engine Viscosity?
![engine oil](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2012/07/13/3452447/dt_engine-oil-20120713104855656372-90x60.jpg)
Drive Team What is the recommended engine oil type and viscosity for the 2010 Toyota Camry Hybrid 2010 in the Australian climate?
Q&A;: Is regular unleaded being phased out?
![petrol pumps](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2012/01/07/2878442/petrol-pumps_20120107092331900625-90x60.jpg)
Drive Team I have heard in various places that there are plans to phase out regular unleaded fuel, forcing motorists with cars not compatible with E10 (a blend of 10 per cent ethanol and 90 per cent petrol) to purchase the more expensive premium unleaded fuel.
Q&A;: Engine seal leak
![engine oil](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2012/06/16/3380372/dt_engine-oil-20120616124219492923-90x60.jpg)
Drive Team Are there any additives from an automotive shop will help stem the leak?
The Drive team answers your questions
Ask the experts: Neutral shift
![Gearstick](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2011/06/23/2447953/gearstick_320-90x60.jpg)
Q. I am driving a 2008 Mercedes-Benz C220 CDI sedan that I purchased brand new. It is my first automatic car.
The Drive team answers your questions
Ask the experts: Fuel injector flush
![toyota badge](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2011/04/08/2295837/toyota-badge_320-90x60.jpg)
Q .I own a 2007 Toyota Corolla Hatchback. Recently, when I took my car in for a service at my dealership, they suggested I have my fuel injectors flushed out and cleaned on top of my normal car service.
The Drive team answers your questions
Ask the Experts: Petrol in a diesel tank
![Expensive error ... petrol in a diesel engine. Photo: afrphotos.com](http://web.archive.org./web/20140803061708im_/http://images-2.drive.com.au/2011/05/19/2371531/diesel_320-90x60.jpg)
Q. Recently, I accidentally added 13 litres of petrol into my Mercedes-Benz E280 CDI and drove for two days before realising something had gone wrong.