Just a musing guys, but was entering another fill up on my fuelly account this morning and noticed the difference in MPG from my old White 2013 GTD (DSG- 18" Negaro's) vs my current 2016 GTD (DSG but with 19" Santiago alloys).
For the white GTD, my average stood at 45.9mpg (63 fill ups over 23,227 miles) vs for my Carbon Grey GTD of 44.4mpg (but only 18 fill ups over 7000 miles). Whilst they are both quite similar (only 1mpg in it), it has got me wondering if the MPG suffers slightly as a result of the larger wheels ? VW's brochure doesn't say anything about 19" alloys (even for the Co2 ratings).
Now I know I did many more miles in the first car over a longer time, and a lot of my current car's MPG has been done from Oct to present (so colder days), it got me wondering if there is any fuel penalty for using the 19" alloys vs the stock 18" units. They both have 225 section tyres, and the above is hardy scientific, but it peeked my curiosity.
It's totally unimportant to me (even if they are worse) as I love the look of the Santiago's, it was just a question that popped in my head ?