Sunday, May 30, 2010 at 19:32
Stale fuel is irrelevant (I know it is wasn't a major concern with leaded fuels).
I was merely commenting who for years that con was "believed" by those that didn't understand the con.
Nothing has changed - it would be like saying today "drain your carby or injectors before storing or not using for a few months because the fuel will go stale."
That con was understood years ago.
Not that we have become a "cleverer country" since then, but surely people do not "pre" drain injectors and carbies? (I'm not talking tank drainage to revert rust lines etc, just draining a system because you will not use it for months or a year etc - surely people drain it just before they are to reuse it. It used to be a great income for mechanics et al!)
As to tyre wear, rotation is to even the wear - it will not prevent accelerated wear.
Fleet owners etc generally rotate as it is cheaper to match and replace the lot etc.
I am merely restating tyre physics - once they start to wear unevenly, nothing stop that uneven wear (you need to skim it down), and an uneven tyre wears faster than than an evenly worn tyre.
The rest is POV. Direction tyres are obvious (whether rotational direction or torque direction - the latter being very common wrt motorcycles; 4-wheelers tend only to be directional wrt rotation).
But I feel that many road-tyres "run-in" to a certain usage.
Anyhow, I never rotate mine - except once when I did have a bad front side scrub, but then I removed the tyres and swapped sides (ie, preserved rotation direction and torque, the obvious outer scrub seemed harder to spot once inside too... LOL!)
Otherwise it's new to front, old front to rear. At the moment I have matched front & rears - the first time in-sync in 10 years (because last time I only replaced the rears - the fronts were still very good).
But I like to spend less on tyres, hence "evening the wear" is less important to me.
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