Unleaded petrol

[perose]

My daughter recently purchased a new Mazda 2 and she has been advised to use "premium unleaded" every 5 or 6 tanks to keep the engine clean. Has anyone else heard of this ?

[KJN]

Yes have heard of it, it wont do any harm not to and it won't do any harm in doing it I have an Audi and about every two months use premium diesel to fill the car up with , can't really say whether it does any good or not but that's the way I am.

[perose]

Thankyou KJN for your answer !

[Toureman]

Read this, Already answered !

http://www.theanswerb...g/Question147799.html

[Old_Geezer]

Isn't xft2012 posts just ads ? Surprised they survive.

[Thunderchild]

I have found improved performance from my engine with premium and my old mondeo achieved 10.4 miler / litre one time (amazing for this car but then I know how to drive economically). I think in my mondeo I got more miles with it, something I am yet to verify with my fiesta that does not have a zetec engine. I think it may vary between engines. in the mondeo I found that it was worth paying more but I don't think I saved too much but at least it drove better. I also found that my engine had to "retune" itself so it took a couple of tanks before I saw any real change.

In an old car with carburetter you would notice it big time as the engines cannot alter for the petrol and the carburetter needs to be set for the particular petrol quality.

[tali1]

I put premium in my Rover 75 and mpg got slightly worse-even if it had got slightly better mpg i would have been disappointed- as it really needs a % increase improvement beyond the % price difference