Sorry, driving like an idiot will potentially end your life.
To suggest that running mismatched tyres front and back, something I and most of the people I know have been doing for years is just total scaremongering. They arent suddenly going to steer you in a ditch unless you are driving too fast and that could happen on a matched set of the best tyres in the world.
Like I said, I dont disagree with the principle, but dont you think thats a bit much?
Anyway, Ive sent the information over to the OP but there are at least two cars that have mismatched tyres fitted as standard. Obviously the manufacturers are keen for their customers to "end their life"
incorrect, the manufaturer will have done the required testing to prove that, that particular combination of tyres achieves what they want from the set up.
Do the testing to prove the set up you choose produces your desired effect in various conditions, log the data, post the results. The data that does exist is that 9X% of manufacturers use all matched tyres and reccomend replacing with all matched and in some cases (eg porsche) will void your warranty for not doing so. The data for using mismatched tyres is where?
This discussion is just full of assumptions. Have data to back it up or dont post it, graphs, tables, diagrams, numbers, statistics, charts.