Fuel economy question

http://thefisgardassociation.org/nostalgia/set3/793/793.shtml

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Write your comments here...Nice one Molly .liked that! . I bet your parents were there biteing their lips holding back the tears as proud as Punch. Only time I see my old chap melt!.

http://thefisgardassociation.org/nostalgia/set3/793/793.shtml

picture 3 of 9 793 entry Lane 1 ..... 3rd from left back row 

Write your comments here...Nice one Molly .liked that! . I bet your parents were there biteing their lips holding back the tears as proud as Punch. Only time I see my old chap melt!.

Write your comments here...I/We were like big kids when our Son passed out 28 years ago.He laughed at me...he still laughs at me ,for many reasons.   

http://thefisgardassociation.org/nostalgia/set3/793/793.shtml

picture 3 of 9 793 entry Lane 1 ..... 3rd from left back row 

Write your comments here...Nice one Molly .liked that! . I bet your parents were there biteing their lips holding back the tears as proud as Punch. Only time I see my old chap melt!.

Write your comments here...I/We were like big kids when our Son passed out 28 years ago.He laughed at me...he still laughs at me ,for many reasons.   

My son joined up at Raliegh so we saw him passing out ... as you say, pround as punch .... unfortunately it wasn't for him and he left after a short time

On the subject of fuel economy take a look at my post in the Towcar thread currently in use.

When I had a set of new tyres fitted to my car, the garage inadvertantly fitted a set that although being the same make and size for my car, had a much higher rolling resistance.  It made a difference of 6mpg in the wrong direction, and cost shed loads more in general use!  I had not previously recognised the importance to fuel consumption that that factor has.

All tyres must by law now carry markings that indicate that factor.  Your garage or tyre dealer will only tell you if you ask!

TF

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I do know tyres make a difference although which to choose always seems to be very hit and miss. I did however at one time have two otherwise identical Cavaliers apart from 5he tyres. Tne first had Michelin and the second I think were Continental. The second one had far less grip for no other apparent reason and given both had tyres from reputable manufacturers I think sticking with what is there if you are happy with them is probably the best idea.

David, The problem that I had was that BOTH sets of tyres that were  fitted to my car were Michelin, and both sets clearly stated that they were for the Mercedes ML.  What the tyre dealer didnt know at the time ( & neither did I ) was that Michelin produced two very different types of tyre for the ML.

One set for the earlier non Blue Efficeincy model had a rolling resistance of 7/8 and the other type for the Blue Efficiency Model had a rolling resistance factor of 2.  My car had been fitted with the wrong tyres in good faith. It was only when I questioned the sudden quite steep increase in fuel consumption did anyone realise what had happened.

My only purpose in raising it is that I suspect that it is mistake that has been made on more than one occasion on other makes too. So its surely better to put people on their guard.

TF

The user and all related content has been Deleted User

You are certainly right there!

TF

I agree that where the load is will have negligible impact other than affecting balance and front axle grip.

My Subaru Forester 2.5XT has put in 26-27 mpg over 113k miles and gets 18 mpg at 62mph towing 1400kg loaded Elddis Avante 556. I need to get familiar with user friendly filling stations!!