Update on Goodyear 20" M&S All Season RFT. Diesel 250d.
Around 500km now, just ran around 220km , highway driving on cruise control, mix 80, 100 and 110kph, ave around 94kph.
Fuel usage sat on 6.0l/100 and at around 180km dropped to 5.7l/100.
Car boot fully loaded and doz bottles red on back seat.
Ride was good, no crabbing at night, temps around 9.c
My gut feel is that Goodyears are less fuel efficient, due to M&S, All Weather design. Maybe around 1l/100 less efficient, over 40,000km that coulfd be a few dollars and cents !!
Did do some cross country work on 4x4 track, very stable, on steep decent and across mud flats.
I still apperciate the Goodyears and their improved performance.
Same highway run tonight in the Coupe, with non RFT, Michelin Latitude 3 type, 250d. No TPMS on that yet.
Results are in !!!!!!!!!!
My gut feeling was wrong.....
Just ran around 220km , highway driving on cruise control, mix 80, 100 and 110kph, ave around 89kph.
Fuel usage sat on 6.0l/100 and at around 180km dropped to 5.8l/100. We stopped for 5 min en-route which most probably accounts for slight variation.
Car boot partly loaded and NO bottles red on back seat, sad face.....
Night temps around 13.c.
So the results of the two test runs, one with RFT, Goodyear and the other with normal Michelin Latitude 3 are that they have same economy returns.
Ride around same, road noise from asphalt about same. Very wet in morning with Michelin and some slight spin/aquaplane on ruts in highway, quickly corrected by 4Matic, have not tested Goodyears in same heavy rain, but were ok in lighter downpours.....
So time will tell, but it looks like Goodyears are winning and may give greater Km life, based on Treadwear 560 figure (US standard I think) (Pirelli Scorpion treadwear was 400 from memory – higher better), Our asphalt might vary wear results.