Tyres - Low Rolling Resistance. Anyone have any data on the latest L.R.R. tyres? I need a set (for Punto 165/70 R14)and am considering the Eco Contact 3 (Continental). What sort of % fuel saving do they give? I am interested in economy as the number one factor for choice.
You shouldn't expect miracles. Brand new LRR tyres will have worse rolling resistance than an old worn set of normal tyres. When you are comparing two sets of tyres of equal wear the LRRs will give you an extra % or two of MPG (for each 10% reduction in rolling resistance you will see roughly 1% reduction in fuel usage).
I personally like the Michelin Energy Savers. But the Eco Contact 3 will probably give you roughly the same fuel saving.
Just by switching to another set of normal tires? Are you sure that the tires weren't just larger diameter? If you switch to larger diameter tires, your speedo and odo will both read high, and when you fill up, you'll think you've traveled farther, which means inflated MPG figures. Unless of course you account for that by adjusting your tripometer number.
I bought and had installed on my wife's Mazda MPV Minivan a set of LRR Goodyear Tires about 6 months ago. Truth be known, I haven't seen any difference in mileage or fuel economy over the previous set of tires. My thought on replacing them the next time they're worn out is that while it probably can't hurt to use LRR tires, if they're the same or close on price I'll get them again, if they're much more, I'll go with the traditional rolling resistance tires and take my chances.